­T-Mobile is about to launch a major online offensive to support its Google Phone, the G1. The campaign aims to deliver one billion impressions in just two days. The company has brought the billion impression block from AOL's Platform-A advertising agency.

Platform-A and T-Mobile have created the "T-Mobile Billion Block," that will run over the next two days. It's possible. The Platform-A brand was launched in the three largest markets in Europe over the last few weeks.

Interesting choice T-Mobile. As everyone and their mother noted: "online ad revenue dropped 6 percent during the third quarter, while its chief rivals saw gains despite a weak economy." This big check from T-Mobile will most certainly help their bottom line. If Platform A can actually deliver these impressions, perhaps AOL will see more of these big checks coming their way and it's not a moment to soon.