TMPGEnc (now called MPEG Video Encoder Xpress) and related products are available at retail stores under the TMPG Inc. label (subsidiary of Pegasys Inc). I've seen them at Fry's ($50-$80) and CompUSA is also carrying them.
More info here.
Canopus has countered with a $50 version of their Procoder software, Procoder Express.
