A. See below. Password is SP2BETA

SP2 Beta for Alpha:
http://www.microsoft.com/downloads/release.asp?ReleaseID=16919

SP2 Beta OLAP Services for Alpha:
http://www.microsoft.com/downloads/release.asp?ReleaseID=16920

SP2 Beta for Intel:
http://www.microsoft.com/downloads/release.asp?ReleaseID=16917

SP2 Beta OLAP Services for Intel:
http://www.microsoft.com/downloads/release.asp?ReleaseID=16922

There is a newsgroup for support issues :-

Server: privatenews.microsoft.com
User Name: privatenews\sql7sp2beta
Password: B24GJ731 (password is case-sensitive)