Found this today 12/31/2010 (Happy New Year!) on Google while checking out the BIOS of an Optiplex 980. "AIA" if you already know about this:

http://supportapj.dell.com/support/edocs/flex/pvs45/BIOS/H192Ham1.pdf 

"...Select OptiPlex models support streaming the operating system from a Citrix

Provisioning Server (ImageServer) using the Dell On-Demand Desktop Streaming™ (ODDS) solution with Dell EasyConnect™ technology..."

And this Dell Solution Guide for Desktop Streaming (34pp, dtd 2010):

http://support.dell.com/support/edocs/FLEX/pvs50/en/cg/cg_en.pdf

You're right though, not much out there - it's back to stone knives and bearskins if you're using ghost, altiris or scriptlogic

"Apologies in Advance"