Transformers: Prime will finally debut at the end of the month (with an odd mini-series schedule) and as a run up to that The Hub has debuted a new commercial. It gives you a decent look at the Autobots and full of Peter Cullen voice over goodness.
Update: MSN TV has posted very brief summaries for the five episodes of the premiere run of Transformers: Prime. (via TFW2005)
Darkness Rising: Part 1 - The return of the Decepticons.
Darkness Rising: Part 2 - The Autobots are met by Megatron.
Darkness Rising: Part 3 - Bulkhead tries to rescue Agent Fowler.
Darkness Rising: Part 4 - Megatron and an army to fight against the Autobots.
Darkness Rising: Part 5 - The fate of the earth hangs in the balance.