httpwebwitch - 8:17 pm on Mar 24, 2010 (gmt 0)
ICANN isn't very forthcoming with info about this. A lot of their documents regarding "new" TLDs are over 10 years old.
A "gTLD" application costs $185,000 USD, plus a $100 USD registration fee, plus $6250 per year, plus $0.20 per domain registration, plus an enormous pile of red tape.
New gTLD's are supposed to support international characters, too. (I'm still looking for confirmation of that). There are big opportunities, if you have boatloads of money to toss in.