symposium Microsite - Info

Here's a microsite I just finished for a big event my company is hosting in September. Visit the actual live site at amssymposium.com. I also designed the logo for the event, you can view the original in my Logo gallery.

The microsite is four pages, I've posted them all here for your review!

What do you think? Is this an effective design & structure for an event like this? How could this design be better? Thanks for your feedback!!