Rob:
I didn't have any luck with the documentation, that's why I started this blog - so we could help each other.
I had a similar question when I started and I sent a support request to MS. Their answer, basically, was that there is very limited support for the grid in 9.0 for architecture reasons, and it might get better in 10. I can tell you for sure that there is no way to get a count in the grid.
Post any other questions that you have here, I'll be happy to help.