You can get IPv6 DIA from them, but not IPv6 TIC. They are not the same. All of the agencies that moved to provider-based TIC cannot get IPv6 service in time for the mandate.

Some people are saying, "Yeah, providers will give you IPv6 addresses for your DIA circuits. I don't see an issue." But they aren't fully aware of other mandates that influence civilian agencies' abilities to meet the IPv6 mandate. Namely, this one: http://www.dhs.gov/trusted-internet-connections-tic. None of the TIC provider's are offering IPv6 connectivity that I'm aware of, but they are all in various stages of getting there. The agencies that are ready most likely host their own MTIPS offering or (more likely) using hosting companies to get there.

I just replaced a Windows 2000/Metaframe XP Feature Release 1 farm with a Server 2003/Presentation Server 4.0 farm. We initially looked at dumping Citrix, due to experience with the previous farm. After seeing the newest version, it was apparent that Citrix has made many improvements and continues to offer features that RDP cannot touch. In addition to what some others have said, you get one more huge advantage. The Web Interface/Secure Gateway combination allows us enable remote access using nothing but https. This makes it easier for our users, negates firewall issues and provides a buffer between the Citrix servers and the Internet.