Yeah, I've been using it on and off for about four months now. I was recommended it by a student who was doing a computer animation degree and he said it was a very easy and fun tool to use. I haven't really produced anything substantial yet, just doing a bit of experimenting here and there. At the moment I've got about eight attempted works, just their most basic outlines established -- I haven't really got round to adding the textures I want yet and I put it off for a while. I am still pretty new to this. :P
Having seen others, like yourself, using it makes me want to play around with it again though. Once I've familiarised myself with the programs' controls and mucked around with a few things I'd be happy to share what I've done.