In the new Portal, go to the MAS 90/200 Support Home Page, and click the main Download link. Then scroll down to the SageCRM Updates link. Then you'll see the various download links including SageCRM 7.0 SP1 (551 MB) (05/05/11)
This is also still available in the old SSO on the EES support page: http://infosource.sagesoftwareonline.com/sw_attach/SSO/e2e/e2e.htm