ICANN is expected to vote to approve a proposal which will open the flood gates creating an almost unlimited amount of domain extensions.
Pricing seems to be set between $100K-$500K for each new extension.
Any extension that get more than one proposal will wind up being auctioned off the the highest paying registry.
This has already stired talk of some seven figures prices that will be paid for extensions like .sex or .xxx
There is a ton of press coverage on this and here two interesting articles: