Service Pack 1 for SharePoint 2010 is now available for download. Questions may arise if it contained the June 2011 Cumulative fixes, but it DOES NOT.
Tip: I highly recommend you install and test all Service Packs and CUs in a DEV environment first, wait for more feedback from the public / forums/blogs and then install in your Production environment.
Download link to SharePoint 2010 Service Pack 1:
Admins, please note: you would have to download the June 2011 CU separately and install it after the Service Pack 1 is installed. The June Cumulative Update includes several important security and bug fixes that are not included Service Pack 1.
Download June 2011 CU here: