You can backup contacts and your calendar by using Google sync:
http://www.google.com/mobile/product...html#p=default
You can manually setup a Microsoft Exchange (google sync uses exchange server) connection through Active Sync by doing the following:
1. go to Tools > Configure Server
2. Type in the following informaiton:
Server Address = m.google.com
User Name = **EMAIL ADDRESS***@gmail.com
Password = ***PASSWORD***
Leave all check boxes checked as well as Replace Item on Device.