We've got the list of voice actors rumored to show up in the upcoming Transformers animated series. Over on Allspark, there's a post of the announced list from last weekend's Botcon.  Apparently many of the lesser-known characters will be as cameos rather than regular characters, but at least some will be recurring, and like any other 'toon, half the joy will be playing "spot the voice" when the pilot airs.  Twenty-nine episodes have already been filmed.

The list:

Prime - David Kaye
Bumblebee - Bumper Robinson
Bulkhead - Bill Fagerbakke
Prowl - Jeff Bennett
Ultra Magnus - Jeff Bennett
Arcee - Susan Blu 
Blackarachnia - Cree Summer
Jazz - Phil Lamarr
Megatron - Corey Burton
Shockwave - Corey Burton
Ratchet - Corey Burton
Grimlock - David Kaye
Lugnut - David Kaye
A Constructicon - Tom Kenny
A garbage truck - "Weird Al" Yankovic
Blurr - John Moshita