It is not,in real sense,a functional .mobi because it just redirects to an m.*.com.However,even this redirection is much better than leaving it idle and unresolvable.

http://idiomag.mobi

A short intro about the site in their own words.

"Idio is a digital music magazine personalised to your interests in music.It keeps you in the know about the artists and genres while helping you discover new music.

Naiyer.