I recently downloaded the Windows 7 Beta and these were some quick notes from working on it. The following tests were performed with the 32-bit version as 32-bit seems to be the corporate choice at this time for client Operating Systems.
For a nice run down of features, check out http://www.winsupersite.com/faq/windows_7.asp
Hypervisors
Citrix XenServer - It didn't work initially until I found this article (http://forums.citrix.com/thread.jspa?threadID=240476)
- Select the Vista 32-bit or 64-bit templates when you create the VM.
- Do not power on the VM at the end. If you did, no big deal... just shut it down because Windows 7 Beta will fail to install.
- Click on the host server in XenCenter and click the console tab.
- Run "xe-list vm" to obtain the UUID of the VM.
- Then run "xe vm-param-set uuid=<vmuuid> platform:viridian=false"
- Then boot the VM and perform the install.
- Once it has been completed, reboot but DO NOT INSTALL THE XENSERVER TOOLS OR BE PREPARED FOR A BLUE SCREEN ON REBOOT AND A REINSTALL.
Microsoft Windows Server 2008 with Hyper-V - Worked with no issues. Integration Services looked like they were installed already but I wasn't able to reinstall or upgrade it.
VMware ESX 3.5u3 - Worked with no issues. Installed VMware Tools with no issues.
Virtual Desktop Brokers
Since it is a client OS, I decided to see if the Virtual Desktop brokers I currently work with Citrix XenDesktop and VMware View worked.
Citrix XenDesktop 2.1 - Couldn't install the XenDesktop Agent (either the XP or the Vista installers). It states it isn't the correct OS. So I'm stuck until this gets resolved or someone finds a workaround.
VMware View 3.0 - Installed, but some features were broken. Single Sign-on did not work so I had to log in twice (not a big deal for testing and using Beta OS code). USB Redirection worked perfectly for my USB Flash Drives but it didn't test anything else. Audio redirection also worked fine.
Lastly, as I have to do in Vista on ESX, I had to change the Power Settings to never let the machine sleep or it would automatically pause itself (XenServer or Hyper-V only use paravirtualziation so the OS knows it is being virtulized and it automatically disables sleep when Vista or Windows 7 are on these hypervisors.)