It's very easy to trade SBD for STEEM using the market functions in your wallet:
Click the dropdown next to Steem and then market. It's a little crazy right now how much STEEM you can by with 2 SBD (and you can see why 2 SBD would be gratefully accepted as a generous donation!)
I was originally going to set the enrollment at 1SBD or 1STEEM, but I decided the consistency of it always being 1STEEM would be better for the long-term health of the program.