you CAN get into cuba, the legal way is claiming it's for humanitarian or educational purposes, usually through a travel company that specializes in that, the "other" way is to grab a boat out of key west, I know people that do it a few times a year and to them it's no big deal, they say for the fun you have in key west for 100 bucks, you can have the same fun in Havana for 10 bucks!
we tried to go one year I was down there, but a couple fuddy duddies that were with us were skeered, so we bailed on that plan. Lot's of people from other countries vacation there. It's just our backwards gov that is holding us hostage.
I'd love to experience it before all the damn tourist americans get there and screw it all up.