Lovinlife83... a critique group involves any number of things, including:
1. feedback on your writing, i.e., does a scene work? is it believeable? is dialogue legit?
2. bounce off ideas about current book or future books.
3. work through your plot.
4. help editing parts of your current MS. (It's always good to have another set of eyes look at your work for grammar, flow, etc.)
5. and general moral support for writing.
Of course, participation requires active involvement on the member's part, not just in requesting feedback, but offering your suggestions and input on other members' works.
If you think you're ready, send me a PM with your email address and a few details about your genre. I've just started this group, so I'm winging it.