I think the new format for LinkedIn makes it much easier to use. For me it's been a great tool for finding fomer colleagues I've lost track of over the years. My new favorite though is Naymz. I like their "Rep Score" feature that gives you more confidence in the information posted in profiles. What other sites do others find useful?

I prefer it to the old site, but I don't use it much. What do people think about Spoke compared to LinkedIn?