TranCreative currently has the most active public HelpSpot forums I've seen. 4 forums each with a full load of posts, great stuff. They've also built out several knowledge books. I love seeing HelpSpot being put through it's paces!

I've emailed with the folks over there a few times, it seems like a great crew. They make products for pocket PC's.

Definitely worth checking out if you're interested in seeing a reference HelpSpot installation.