Lately, Finder has been crashing on me a lot, especially when I right-click. After messing with things a bit to see what the problem was, I came to the realization it had to do with the contexual menu. I noticed that there were only two applications being referenced in the menu itself, Roxio Toast It 8 and Stuffit 11. Even after messing with both application's setting and so forth, Finder was still crashing. Finally I went to Stuffit's support site and found that there is a bug in the latest version, 11.0.2. There is currently a patch that fixes Stuffit's contexual menu plugin. Here's the link if anyone else is having this issue:
Patch