I know all about that interference thing. I've been trying to read up on game physics ever since the semester ended, and I had intentions to not only make an airplane physics demo, but me and a friend were supposed to either work on 2 game projects together(one for the XNA competition and one for fun), or just the one for the competition, I can't remember because I haven't talked to him at all this summer. I just feel so relieved to have no responsibilities taking over my time, I just get entirely wrapped up in games.
But hey, you know what they say about procrastinators...if you wait 'til the last minute, it only takes a minute.
