To share with the rest of the class, the mu-plugins that I've just casually tested to work with the WPMU 2.7 snapshot as of today are (and by "working" I mean "didn't blow up this copy of WPMU" not "work perfectly"):
- Add User Widget 1.0
- Additional Tags 1.0.0
- Admin Message 1.0.3
- WPMU Theme Stats 1.0
- Akismet Credit Inserter 1.0.1
- Akismet 2.2.1
- Anarchy Media Player
- Avatars 3.1.0
- Blog Activity 1.1.0
- Content Monitor 1.0.4
- Dashboard Feeds 1.5.0
- Domain Mapping 0.3
- More Privacy Options 2.7
- Google Analytics Insert 0.1
- Invite 1.0.7
- Invitation 2.0
- Limit Country Signups 0.1
- List-All-Posts 0.0.2
- List-All 0.0.5
- Login As... 1.1
- Mass Mailer 1.0.1
- MU Admin Bar 1.4.4 (but it looks wonky compared to the new WordPress admin bar)
- Show Media Buttons 1.0.0
- Signup Password 1.0.0
- Signup TOS 1.0.4
- Sitewide Tags Pages 0.3.1
- TanTanNoodles Simple Spam Filter 0.1
- User Activity 1.0.0
- Sitewide Feed 0.3.2
- Zappo WPMU Top Posts 0.42.4
And these plugins appear to work as well:
- Wiki Inc. 0.5
- Dagon Design Import Users
- Post Revision Display 0.1
- Role Manager 2.2.3
- Subscribe to Comments 2.1.2
- WP-Stats 2.31
Finally, my modified versions of Cutline and Carrington-blog both appear to work just fine. Woohoo! If WPMU is released before Monday, I'll upgrade. Otherwise, I'll have to wait until the end of the semester because I don't want to push out such a radical redesign of the dashboard/admin interface in the middle of a semester...