Just had a look around on the site. Looks great and there are already some nice wallpapers there (I liked 'Calypso' too, thanks thecursedfly).

I had a thought -- wouldn't it be sweet if the 'loopable' sets were tagged somehow, so you could see quickly which are loopable and which are not? I bet those will be quite popular but it isn't always easy to identify them...

Bonus points if you could click somewhere to bring up a list with all loopable sets.