Just an update, there is a 3.X plugin available. It seems to work great. It still has the weird bits on the confirmation, reminders, cancellations about the location, venue, room fields which no longer exist (not since 1.9) and if you add custom fields you'll have to fiddle with the language pack to get it to display but it displays on the course page (which the 2.5 version didn't) and it ROCKS!
Just to explain my insane positivity...I changed jobs and the new employer updates frequently instead for making me beg for updates (and get turned down), so I'm super stoked about using the awesome!