Meta.Txt is it real?

Is Meta.Txt an accepted protocol?

[iPullRank]

What's up good people of Webmasterworld.com! Long time, reader first time poster.

At the risk of sounding like a noob, I've been researching best practices for mobile search and I came across something called meta.txt.

Meta.txt defines multiple User-Agent entry points for a suite of web sites, be they the more traditional pc sites, mobile sites or the media that they contain. Acting as a peer to the robots.txt file, meta.txt is a HTTP accessible file which resides on the local URL “/meta.txt”. Working in a converse manner to robots.txt, meta.txt files will indicate which url a User-Agent should follow to bring end users to web site information most relevant to them. Additionally, meta.txt will allow end users to have this information presented to them in the format most appropriate to the platform they are using to access the web, moving us closer to the utopian vision of “One Web” (http://www.w3.org/TR/mobile-bp/#OneWeb).

However I can't find anything "official" on the topic. I'm hoping to tap into the wonderful groupthink that is webmasterworld. Has this been accepted? Has anyone done any testing? Are engines following it?

Thank you all so much!

p.s. Yes I did do a search on the forum first. All I found was an unanswered thread from 2009.

[goodroi]

I know some of the smaller sites advocate for it. I do not recall if the big search engines have formally announced they are using it. I know Google allows for mobile xml sitemaps.