I upgraded to WordPress 2.1. I also updated the k2 theme to the newest available which says it is supposed to work with the new WP2.1.
How is it so far? Good I guess. I don’t know the ins and outs nor do I really care but it’s good enough for me. I enjoy using the WYSIWYG editor and they also implemented something really cool where you can switch between code and the WYSIWYG editor. Toodles.