Matt Hester beat me to it.  Well, not really.  We'll just let him think he did.  Matt posted some information about the Windows Vista Hardware Assessment v2.0 release so check out his blog post.  I was going to post some information this weekend but backed off because I hit some issues I reported to the development team.  Oh well, since the cat is out of the bag, here's a couple of things to keep in mind about the tool:

1. Read The Fabulous Manual (RTFM) - you pretty much have to.  There are a number of service and firewall configuration details you'll need to address depending on the networking and security environment you are running in.  This is true even for home networks.  There are also some registry settings you'll likely need to change.  If you are in a domain based environment, group policy will be your friend here.  The documentation is very good but I found I also needed to start the "Remote Procedure Call (RPC) Locator" service for my WinXP MCE 2005 machines to be scanned.
2. Reporting - I had some issues with the application reporting so I would be interested in your experiences.  Did you get a complete and accurate report of the applications for all machines?

Get the tool @ http://www.microsoft.com/downloads/details.aspx?FamilyId=67240B76-3148-4E49-943D-4D9EA7F77730&displaylang=en.

Make sure to checkout the webcast and TechNet Radio interview links in Matt's blog post.  Cheers !