Sanity Music online store has a Transformers competition going, but entry requires purchasing the TF3 Soundtrack from their site and emailing them the purchase number AND who your favourite Transformer is and why, in under 25 words.
And only one entry per purchase.

Prize - 1 x Transformers branded MiLi iPhone projector & 1 x MiLi charging mat 4.
Value - $600.

Open to residents of Australia and New Zealand.
Entries must be received by end of 25th June.