Daniel Feller just pointed me out to these new Consulting Whitepapers for XenApp 5.0 for Windows Server 2008. If you are working on XenApp 5.0 for Windows 2008 these are great bookmark links. They are all available for download via Citrix Support site.

Simplifying the Migration to XenApp 5 with XenServer – Getting Started Guide

Simplifying the Migration to XenApp 5 with XenServer – Reference Architecture

Simplifying the Migration to XenApp 5 with XenServer – Implementation Guide

You can get a list of all XenApp 5.0 whitepapers here

Consulting Whitepapers for XenApp 5.0 for Windows Server2003

Consulting Whitepapers for XenApp 5.0 for Windows Server 2008