Update: I visited the Circuit City website and it looks like I can use the generic Toshiba form available here (http://www.circuitcity.com/rpsm/oid/169466/rpem/ccd/RebateDetails.do?oid=177362 to get the 5 HD DVDs. I printed out the pdf. I'll select 5 of the 15 available videos, include the UPC and a copy of my receipt, and send away for 5 free HD DVDs. The form mentions the Toshiba HD-D2 (the Costco one) as a qualifying purchase. Basically, if you can prove purchase of a Toshiba HD DVD player between 3/1 and 7/31/07 and send back the form by 8/31/07, you qualify.
06-02-07: Johnnyb53
I ... got the D2 at Costco for $249, but it didn't have any mail-in for 5 free movies....
Cool.