Hi there.
Great kudos to the author - undeliberately best calendar plugin for WP (and I have tried many of theese)
Only one thing I would suggest is to add a possibility of setting an hours of an event for separate days. I mean I have a 2-day event starting lets say 01.12.2011 at 4pm and ends at 8pm, then the second day is 2.12.2011, and the event starts 2pm and ends 8pm.
Now I can only set the start and the end of entire event, which is not enough for many many users.