According to my info there is no Rollup 2 for MS CRM 3.0 Service Provider Edition
For MS CRM 3.0 Professional Edition you can download Rollup 2 from:
http://www.microsoft.com/Downloads/details.aspx?FamilyID=81674da5-ffef-492a-a7b1-7e1f1951b05f&displaylang=en
According to this article it is planned but does not appear to be available:
http://support.microsoft.com/default.aspx?kbid=927751
See section on service providers