support = serve as an assistant, runner, or substitute teacher/coach/leader of whatever you fancied within their offerings . . . the details would all depend upon the offering(s) you choose.
For example, helping with a book club vs. helping with an academic team would be so different; but if you concentrate on what y'all fancy, then it is pure fun
KaraBoo, have you checked out their website? I know that they're organizing their Fall 2011 offerings right now (our proposals are due on July 22nd) so the website will probably be updated sometime in August.
Feel free to contact Kari - she's phenomenal! It's a very dynamic & eclectic group of people coming from the many different styles of homeschooling & areas of town