According to the pre-order page, Microbots Collection are available in the month of August 2010.
Microbots Collections are cute little Animated robot figures, with the following lineup:
- Optimus Prime
- Bumblebee
- Grimlock
- Megatron (Earth Mode)
- Starscream
- Blackarachnia
Check out original post here.
Stay tuned to Seibertron, Ultimate Resource of Transformers!
...than again I think I'm gonna extra wait for the Takara Arcee and Blackout 
