Purple Sky is two column, fluid width, widget ready theme. Preview.
Redoable 1.1 is a two/three column hybrid version of K2 with lots of features built in. I really like the middle column asides and the colors are interesting.
wpjeriko01.2 is a two column, widget ready theme for WordPress with rounded edges and featured posts. There are two color options available for this theme and there are screenshots and previews available at the link.
umm, Redoable looks pretty good, but i prefer it more simple and elegant.
Thanks for redoable :). Thanks for telling about it :D.
Thanks for redoable, if you want redoable in spanish check here.