I have used frames in the past but not for a few years now. At one point I used 9 frames for no other reason than to obtain a layout that would have more easily been acheived using tables... d'oh!

Frames are not only bad for SEO, (which they are very bad for), they are also bad for people that want to bookmark your pages... Come into a frames based site to find something, go through 11 pages till you find what you want and decide that you want to bookmark it for later... Well you're going to have to go through the whole process again because the bookmark will only reference the first page of a frameset.