Pfizer ($PFE) is testing the online-sales waters with a new program to sell Viagra directly to consumers. It's a natural choice: Makers of erectile dysfunction drugs have been working on packaging and formulation changes to make it easier--and more discreet--for men to use them. This new channel is about as discreet as you can get for a prescription drug. As the Associated Press notes, men don't even have to face a pharmacist. Article