Ok, after working with vizio for many hours they formed a team of people to test about 10 media servers and which will play the file types. This is one time where "one person can make a difference" payed off! I've spent a ton of time on this and still feel TvMobili is the way to go, because I'm in direct contact witht he author of the program who updates the engine on the fly. But, everyone look at this:
See my attachment here, click to download, http://www.avsforum.com/attachments/73871
that has notes on each media server on what to tweak to get it to work with vizio tv's.
NOTE! Vizio tv's handle these files differently than other tv's (requesting information about the file before and after the transcoding) and even the most popular media server app, ps3 media server doesn't work with the Vizio yet.