Rate-lookup support for other shipping methods/services are still on the wishlist, and I don't know how much if any progress has been made on that, as Development runs the show around here and keeps their plans and works-in-progress pretty close to the vest.
Suffice to say that adding support for any new rate-lookups would certainly need to wait at least until the new DHTML-based Seller Admin we've been working on is complete and ready to go live, so we could add the new rate settings to that interface. Our current Flash-based Admin has become just too complex to modify readily without risking breakage, hence our decision to build a new Admin from scratch in DHTML that's more conducive to ongoing modification, so any planned new functionality requiring modification/enhancement of the Admin interface is being rolled into that new Admin project.
