Forum list idea
On the main entry point for the forums, how about putting a short description of what the extension does under the forum title.
Example:
DataAssist
Build database-driven catalog pages and administrative sites without coding
This would provide pre-sales users a quick way see what all the extensions do, and where to ask pre-sale questions.
I recently answered a question from a Super Suite user that didn't know what Surveyor did, even though he had it.