If you are not in a position to add more bandwidth to your infrastructure, but are still interested in Cloud computing or VDI for remote users, you might want to look at Ericom Blaze, a software-based RDP acceleration and compression product that provides improved performance over WANs and congested LANs. Besides delivering higher frame rates and reducing screen freezes and choppiness, Ericom Blaze accelerates RDP performance by up to 25 times, while significantly reducing network bandwidth consumption over low-bandwidth/high latency connections.

Ericom Blaze works with any standard RDP host, including VDI, Terminal Servers and remote physical machines.

You can read more about Blaze and download a free evaluation at:
http://www.ericom.com/ericom_blaze.asp?URL_ID=708

Adam