I’m keeping Opera around. I love it.
Flock is still my “main squeeze” of a browser. It works well.
Opera is fast, small, lightweight, and has a HUGE area for reading webpages (very important).
Also, it’s come along very nicely. It’s more compatible with Gmail and Google Reader.
Opera doesn’t have all the integration that Flock does, but it does have the “widget” thingies. They’re quite nice.