Just when we were expecting another delay in Sprint's release of the Treo Pro, we run across the phone in Best Buy's Mobile Buyer's Guide for March! The Treo Pro (listed as Palm Pro) will run you $249.99 with a two year contract. Strangely though, if you're upgrading it will run an extra $20 (activation fee?). There's no availability date listed but the Buyer's Guide is dated for February 22, 2009 through March 28. 2009.
Thanks Gabriel for the tip!