This forum finally got to me... this afternoon I took my beater rigid steel MTB that I use to get around campus, and fixed it...I just took off the derailleurs, shortened the chain, and picked a gear combo that gave me a straight chainline. I took apart the cassette hub and reversed one of the pawls, so hub now will not rotate. The bike has vertical dropouts, and the tension was a little bit loose, so I put the rear derailleur (with mods) back on as a tensioner. I know this isn't ideal, but it's good enough for me.
As for the ride...this is my first fixie so it was a pretty different experience riding it. The tensioner gives a little bit of play when changing from acceleration to deceleration, and the hub rotates just a little back and forth. It's definitely fun to ride Plus it's probably the ghetto-est fixie ever! Haha...if anyone knows of competition, post away!
I'll post pics tomorrow if anyone's interested.
Total cost of project: $7 for the bike at a police auction...didn't need any other parts.