BrianMadden.com recently published an extensive review of the VDI platform based on KVM that Virtual Bridges offers since December 2009: VERDE 3.0 . Some key points of the review: Almost 100% command line oriented (version 4.0, expected for April, will introduce a server management GUI). Supported protocols are RDP and Virtual Bridges implementation of RFB (used by VNC). VERDE’s RFB is pretty fast, Virtual Bridges claims it is superior to RDP 5. The open source version of Red Hat SPICE protocol is unusable, will be adopted in future if possible.

The rest is here:
virtualisation.info