Update: Turning off UddeIM PMS in the CB2 admin area, and turning on CB PMS, fixed the site loading issues. Now I'm wondering if I should just migrate to the CB PMS. My users have about 100,000 messages in the UddeIM database, so they might be a little disgruntled about losing stuff... {shurg}

Are there any examples on what the CB PMS looks like?

I think I can mark this one as solved, with the following SNAFU on my part:

When I upgraded to CB2 and then UddeIM 3.7, I loaded the wrong UddeIM plugins. I loaded the CB1.x versions (in blue), and not the CB2 versions (in red). Once I got the rights ones installed through the CB Plugin Manager, things started coming back to normal.

Thanks for your time and pointers.