A report from Search Engine Watch Forums says that all of a sudden, the option for Google TV ads appeared for him when he logged into his AdWords account.
Just logged into my AdWords account and was greeted by a message announcing that TV Ads are now available. Not yet checked out the details.
I don't see the option myself, but it appears Google may be doing an additional push to test their TV ad distribution system. Google has been sending out beta invites in the past, in fact, you can read most of our coverage on Google TV ads here.
Here is some screen shots of what it looks like to set up a TV ad in Google AdWords:
Forum discussion at Search Engine Watch Forums.