The document Hotfixes and Security Updates included in Windows 7 and Windows Server 2008 R2 Service Pack 1 Beta has the complete list of what’s fixed in SP1. RemoteFX might steal the show, however I’m specifically interested in what fixes there are for Terminal Server or Remote Desktop Session Host as it’s now called.

The table below is filtered for just those fixes, each of which is available now if you can’t wait for SP1 due in H1 2011:

KB Title
http://support.microsoft.com/kb/969851 Instead of the specified startup program, the whole desktop is started on a remote desktop connection when you change the Terminal Services Profile setting for the user account
http://support.microsoft.com/kb/973062 The audio redirection feature does not work when you use Remote Desktop Connection Client for Mac 2.0 to make a terminal server session to a computer that is running Windows Server 2008 x64 Edition or Windows Vista x64 Edition
http://support.microsoft.com/kb/976484 You have problems when you try to connect to the Remote Desktop Gateway (RD Gateway) that is hosted on a computer that is running Windows Server 2008 R2
http://support.microsoft.com/kb/977627 You cannot open a remote application or a remote desktop by using Forefront UAG
http://support.microsoft.com/kb/979425 A combo box item in a RemoteApp application is updated incorrectly when you connect by using Remote Desktop Connection (RDC) 7.0
http://support.microsoft.com/kb/979443 You do not receive a warning message when a remote desktop connection fails from a Windows 7 or Windows Server 2008 R2-based computer
http://support.microsoft.com/kb/979470 Remote Desktop Services does not prevent a console session from being disconnected in Windows Server 2008 R2
http://support.microsoft.com/kb/979530 A Windows Server 2008 R2-based Remote Desktop server denies some connection requests randomly under heavy logon or logoff conditions
http://support.microsoft.com/kb/979548 You cannot enter an agreement number of a volume license that contains more than seven digits in Remote Desktop Licensing Manager or in TS Licensing Manager
http://support.microsoft.com/kb/979734 Description of an update for Remote Desktop Services BPA
http://support.microsoft.com/kb/980909 The home folder could not be created remote desktop error in Windows Server 2008 R2
http://support.microsoft.com/kb/981156 RemoteApp applications are displayed as black windows when you restart the applications in a Remote desktop connection in Windows Server 2008 R2
http://support.microsoft.com/kb/980393 Two users accounts that are logged on to the same computer cannot use Windows Photo Viewer at the same time in Windows 7 and in Windows Server 2008 R2
http://support.microsoft.com/kb/981208 Poor performance when you transfer many small files on a computer that is running Windows 7 or Windows Server 2008 R2

If you can’t wait for SP1, a list of recommended updates for RDS is available here: Recommended Updates for the Remote Desktop Services (Terminal Services) in Windows Server 2008 and Windows Server 2008 R2

If you’re interested in the Group Policy fixes in SP1, Alan has listed those here.