I've got one too -- left side, same area, right along the underwear line (it helps to wear thongs because they don't rub it). It's kinda like two saddle sores next to each other so just merged into this large purple thing. It's tender when I press on it. I did finally get some blood out the other night (sorry, TMI), but it just seems to fill back up again. I've been wearing the most amazing Sugoi RS Flex shorts lately, and those help a lot with any pain while riding, but my doctor said it was unlikely to heal on its own and that a dermatologist would probably have to excise it. She recommended I have it done during the off-season (dead of January) to allow for proper healing time out of the saddle.

I do feel your pain!

Emily