It seems like money grows on trees for MS but at Convergence 2007 it's not about the trees, it's about the MOSS. That would Microsoft Office Sharepoint Server, not the gray stuff that grows on trees.
The bottom line going forward with GP is, learn MOSS. It's going to be the underpinnings of so much going forward that you're not going to have anything slick that you can do without Sharepoint. Yes it's more licenses, more servers, I know. But unless you're willing to give up all the collaborative features of GP in the future, you'll need MOSS. Let's face it, it's a collaborative world, so learn it sooner rather than later.