SP1 Upgrade packages available for download : http://www.microsoft.com/downloads/details.aspx?FamilyID=20824f84-b98a-4e42-93a7-045a7a58e289&DisplayLang=en

SP1 Evaluation packages available for download : http://www.microsoft.com/downloads/details.aspx?FamilyID=246df207-f051-47c3-bd64-c9072281c3c8&DisplayLang=en