Currently we are running SharePoint 2003 (upgrade to 2010 is a possibility for next year). We are looking for a discussion board that has the integration of SharePoint boards, but the usability of phpBB or VBulletin.
I had looked at LightningTools' Social Squared (which appears to be an overlay on top of SharePoint?), and if we were running 2007 or 2010, it would be the solution for us. Unfortunately, it is not compatible with 2003.
I have looked into Jive, Lithium, etc. but they appear to be much more full featured than what we are looking for (and probably quite a bit more expensive than the < $5000 of LightningTools' product)
phpBB would solve most of our issues, but from what I've read its integration leaves much to be desired.
Does anyone have any insight for me? I'm starting to get frustrated with this project. Oh, I should mention that the key drivers to the decision are: Low cost, minimal administration, integration with existing systems.