Buffalo just posted a dd-wrt firmware revision on thier site for this on 3/26/15.
UPDATE: Got the router today. Buffalo’s web site download page for DD-WRT requires a serial number from the router. The web site is in Europe and the US sold units serial numbers state the the serial number is invalid. Still waiting for a US version of DD-WRT from the Buffalo site. Beta versions from the DD-WRT.org site do work according to the forums.