Vasalgel: Condomless, Hormoneless, Male Birth Control
Vasagel is a polymer injected into the vas deferens, which physically blocks sperm. Unlike a vasectomy, which snip the vas deferens, the blockage can be removed later with a second injection.
It should be entering human trials next year and, all being well, it could be available by 2017.
Vasalgel, a multi-year contraceptive
News report with video
Male Birth Control, Without Condoms, Will Be Here by 2017
Thunder's Place: increasing penis size one dick at a time.