CircleID

.MOBI is a most interesting experiment.  Once the big players get established, they plan to throw it open to individual registrants. There's a whole bunch of rules about what's supposed to go in .MOBI, mostly requiring that it work from mobile phones. In Luxembourg, someone from .MOBI came and talked to the ALAC, and I asked what would happen if someone started putting random non-mobile junk in a .MOBI domain.
They have a process, but it's so slow and cumbersome that it could handle, oh, three problem domains a year.

So a year from now, when you see .MOBI overrun with the same high quality registrants you see in .BIZ and .INFO, you heard it here first.

Oh what fun. And isn't .mobi meant for only mobile infrastructure? No reason to see email related traffic through it at all I'd guess?

MOBI from English "mob" and initial of the Occidental root "individu"; or latin plural "i". Any member of the disorderly crowd of Internet users. A specialised TLD for individual activist domain name (IADN, not to confuse with the other worldwide ICANN success, IDNA). Lead to the neologism: "mobiist".

NB. The mob of individual domain name owners was named IDNO in the past and was initiated by Joop Teernstra.

Not affiliated to mobil oil.
Hidden address registration site "http://mtld.mobi".
(look-up error until further notice).

Demonstrates that ICANN does not master the DNS yet: as a proof of disconcept one can try mobi://icann.org. This lead a while some to understand "mTLD" as a new ICANN type of TLDs (moot TLDs). But "mtld" is a nice mnemonic for "My TLD"....

Direct competition to ".gprs"

Mobi, welcome to the TLD mob!

Responding to Suresh, .mobi is not meant exclusively for mobile phones - it's a reasonable method to help ensure that web and other Internet content will work in a consistent manner on mobile devices.