I finally got my tablet to work, after several minutes filled with cursing and a strange urge to punch the walls. It's still not pressure-sensitive like it's supposed to be, but it works well enough to use.
And I've made a half-finished painting in PhotoShop, from scratch. Which is both awesome and painful, 'cause I'm definitely not used to drawing for several hours on end. I'm trying to obtain a sort of painted look, and even though I'm not sure it works very well I'm having a lot of fun!
So, now my back, wrist and legs are hurting from sitting in more or less the same position for three hours. And drawing. Lots of drawing. @__@
Anyway, I hope I'll be able to post the finished product here soon. Maybe later this weekend?