Starting tomorrow, T-Mobile will begin advertising its long awaited Gphone after nearly a year of buzz from technology reporters and bloggers.

"We chose not to do a classic teaser campaign in advance of the launch," said Denny Post, T-Mobile's CMO. "There hasn't been a need to create awareness. We choose to spend the money when people can walk into the store and buy the phone."

While many in advertising will be watching to see if T-Mobile can convince users that it has a better handset than the BlackBerry or iPhone, the campaign will also be something of a test for mobile advertising more generally, which has long been stigmatized for having tons of potential but little to offer in terms of actionable tools for marketing today.

One sign that mobile advertising may be moving in that direction is a report that AdMob, a firm specializing in mobile, has closed another $15.7 million in venture capital financing. AdMob is reportedly looking to expand its workforce even during the current economic crisis.