It's not yet clear if the drug Gardasil, the vaccine intended to prevent the human papillomavirus (HPV) in females, is effective for men. But some men are signing up for the chance to take the drug.

Gay and bisexual men in San Francisco are asking their doctors for the vaccine with hopes it will prevent anal and penile cancer, also caused by HPV.

"The prevalence of anal cancer among gay and bisexual men is very high," says Jason Riggs, spokesman for the STOP AIDS Project. "So that's why some people are looking at this as a possible preventive cure for anal cancer and HPV that causes anal cancer."

Anal cancer occurs among gay and bisexual men at a rate 35 times higher than that of the general population. And it occurs more in those infected with HIV.

Researchers have found that when cells become cancerous, they become 100 times more likely to genetically mutate than non-cancerous cells. This explains why tumor cells have so many mutations. Good news on the research front. But bad news on the treatment front -- because therapies that target a certain gene may be largely ineffective in controlling cancer.

"This is very bad news, because it means that cancer cells in a tumor will have mutations that protect them from therapeutics," says lead researcher Dr. Lawrence Loeb, professor of pathology and biochemistry at the University of Washington School of Medicine in Seattle, who presented his findings February 18 at the meeting of the American Association for the Advancement of Science in San Francisco.

Loeb says chemotherapy drugs target specific oncogenes -- genes that affect the malignancy of a cell -- but if cancer cells are mutator cells, then a single tumor may have cells with all sorts of oncogenes. And while chemotherapy may kill some cancerous cells, millions of others will live on.

It's not all bad news, though, says Loeb who believes this research may help doctors determine the stage and malignancy of tumors by testing the number of mutations. It may also help researchers understand what makes a cancer cell a mutator and how to slow the rate of mutation.

"The idea is that if you might normally get exposed to something in the environment at 20 years old that would give you cancer by age 55, then if we cut the mutation rate in half, you might not get cancer until age 90, and you may even die of something else before that," Loeb explained.

I'm not sure it matters what color computer hard drives come in. What does matter is that the Seagate Pocket Hard Drive has partnered with one of the leading breast cancer foundations -- the Susan G. Komen Breast Cancer Foundation. And to signify this partnership, Seagate has chosen the power of one color that really does matter when it comes to breast cancer causes. Pink.

Ten percent of the price of this 6-Gbyte drive will go to the Komen Foundation. Seagate, also a sponsor of the Komen Race for the Cure in San Francisco, reports that the drive comes preloaded with songs and videos from popular musicians -- like Joan Jett, Stefy, Toby Lightman, and more. The hard drive will be sold through Amazon.com and Buy.com for an estimated $109.

New CBS Evening News anchor Katie Couric is on a six cities tour to connect with viewers and promote colon cancer awareness to encourage colon cancer screenings. 

On Tuesday, Couric was in Dallas to attend a benefit luncheon for the American Cancer Society. According to reports, most of her talk was about her husband Jay Monahan's colon cancer diagnosis, treatment and death. She is quoted as saying, "He felt invincible, immortal, before doctors found that he not only had colon cancer but also that it was at an advanced stage, taking over his liver." She described Monahan's last day and the moment of his death. There were many tears in the audience.

Couric expressed the feelings many cancer patients and their families feel when the diagnosis of cancer is given. "Suddenly you need to have a medical degree to deal with all the options," she said. One of the reasons she worked to open The Jay Monahan Center for Gastrointestinal Health, named in Monahan's honor, was because she wanted to create the kind of center for others that both her and her husband would have appreciated when he was first diagnosed with cancer. 

"It was a very lonely and isolating experience and very harrowing to go from one specialist to another. Having this comprehensive center full of compassionate caregivers all under one roof would have been a wonderful place for us to go. The opening was a bittersweet occasion, but the center is going to be incredibly helpful to thousands of families and what can be better than that?"

Couric began her six cities tour in Tampa, Florida. Today she was in Dallas and plans stops in Minneapolis/St. Paul, Denver, San Diego and San Francisco. She takes over for CBS Evening News Bob Schieffer on September 5.

Six years ago, when Jane Tomlinson was diagnosed with advanced metastatic breast cancer, the doctors said she had six months to live. Instead of dying, she has gone on to compete in a number of triathlons --including a 2,500-mile bike ride, from Rome to Leeds and last year the New York Marathon -- all to raise money for breast cancer charity. At the end of the year, after raising £1.25m total for cancer charity, the mother of three took a break.

Tomlinson is back. On June 29, she will begin cycling 4,200 miles across America for cancer charity. Beginning at San Francisco's Golden Gate Bridge and ending in New York, Tomlinson's Ride Across America will bring her charity fundraising to a £2m total or better. Tomlinson is currently undergoing chemotherapy, but will have five weeks to recover from that before she begins her ride. Tomlinson, 42, will have the company of Leeds Metropolitan University lecturer Ryan Bowd, 27, of Calgary, Canada, and 40-year-old Martyn Hollingworth, of Huddersfield, West Yorkshire on her 62 day challenge. You can learn more about this inspiring breast cancer survivor, her remarkable adventures of accomplishments in living and upcoming progress at Jane's Appeal. Jane Tomlinson has also written a book called The Luxury of Time. I am on my way over to Amazon right now.