PyOgre is probably pretty good, although it's a pain in the buttocks to install, because there aren't really any binary packages available for Linux distros. There was one game in the competition using PyOgre that's called Steamech by Team Landshark, but my meager video card (Intel 855GM) couldn't really handle it for whatever reason. Perhaps their textures were oversized or something.
Our team did indeed make Trip on the Funny Boat, which you can get here: <shameless-plug>http://www.pyweek.org/e/Pekuja/
</shameless-plug>. I did most of the coding, while my two friends Hectigo and JDruid did graphics and music. I'm glad you liked the game. :-)
Python is a great language for game development and other things. Sometimes I was astonished when my code actually worked right after I wrote it with not even syntax errors to be seen. ;-) If you have trouble with the motivation, you should probably take part in a competition like this one. There are some other ones too, like the Ludum Dare 48h competition at http://www.ludumdare.com/
, although I think PyWeek is the only one centered around Python (or Linux). The competition motivates you and you have a deadline, so even if your motivation drops, you know that there's just a couple of more days to go, so you can still fight your way through some more code and have a working game by the end of the week. :-)