Anime Banzai spotted it first; more Il Teatrino content is now on the Gunslinger Girl official website.
http://www.gunslingergirl.com
Half the site is still under construction, but some character artwork is offered for now. It’s definitely different from first season. I’m not sure which is cuter, as both styles don’t depict the girls as moeblobs (and they aren’t). This new style seems Higurashi-like, especially in Rico’s creepy-looking smile. Henrietta looks devious, and Triela (my favorite) looks flat-faced in that sample photo, hm. Angelica gets brown hair. And ooh, I do like Claes. Giuse (Jose?) looks younger.
I’m sure it’ll look a lot better once animated, and we see everyone in action. ^_^ Looking forward to it! (There’s a trailer section that will be up soon, too.)
~Crisu

Oooh~ It certainly has evolved since the site first appeared back in September (or late August…?) This’ll be a neat watch this winer.