It looks like future versions of Voice Command on WM are going to be a whole lot smarter after this acquisition. Tellme Networks does voice recognition and has also been running the voice search service at 1-800-555-TELL (8355). A quick check of the service just now tells me (cough) that Tellme seems to do a better job at voice prompt recognition than most of those annoying call centers I have to use (How many times have you said "Operator. Operator! Shut up and let me talk to a human!"?).
Microsoft Corp. today announced it will acquire Tellme Networks, Inc., a leading provider of voice services for everyday life, including nationwide directory assistance, enterprise customer service and voice-enabled mobile search.