You can download it by two ways below:
WebInstaller:http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID;=75cbcbcd-b0e8-40ea-adae-85714e8984e3
The new feature of VS2010:
Enhanced user experience, Parallel programming,support for Cloud development and support more databases,such as DB2 and oracle.
