Wednesday, March 25, 2009
Not exactly a Great Plains specific event, but definitely something for Microsoft Developer's to check out:

TechDays is a free, one day (24 hour), live virtual conference/event. It's on the web, so its in your region! Sign up and build your schedule already. Don't worry, you don't have to attend the whole 24 hours (except you hard core devs, you know who you are). Did I mention that it's free?