I know of several partners who have been emailing me on a weekly basis to ask about this. :-) Microsoft Dynamics CRM 4.0 is compatible with Citrix Presentation Server 4.5 (32 & 64 bit). This should help out a partner or two in deploying CRM. You can read more about it at: http://www.citrix.com/English/ps2/citrixready/product.asp?contentID=1297093#top
My Hat is off to the team in the dev organization who made this possible.