You Want to Draw Your Own Opinion on Judge Sotomayor?
The ever-useful, and relatively unbiased, SCOTUS blog has summaries of her decisions here, here, here, here, and here.
That's a lot to read and, frankly, I haven't had the time to go through it all. But, from what I've read, I get the impression that she's a relatively unflashy left-of-center justice. Pretty much in the mold of the justice she'd be replacing.