My bio prof was talking about this kind of stuff last week when lecturing on the population problem. I think it sounds kind of crazy. It would be a great thing if it did work well. I don't think it'll have a huge effect on society, considering the pull-out method is the most 'popular' one at my school atleast. I don't know if'd I want to go to the doctor and waste my money on something that a condom could give me the same mind set with. You just need to wear a condom correctly.
By the way, Roman, I am more worried about pregnancy that STD's. Most the STD's ya can get rid of, or control atleast. Would you have an abortion if ya got a girl pregnant? How could ya raise a kid, I couldn't at this point in my life. Both things are scary though, that's why no matter what ya wear a condom. That's also why ya can normally get them for free from all sorts of places.