the premium editons are just re-release of the existing movie toys (so if they were a deluxe, they still are a deluxe).
They are part of the allspark wave. I would say keep aneye out in stores in the next few weeks for them. They include a "movie real" premium BB, Jazz, Barricade, Ironhide, Prime and Megatron. The Prime is the new leader class with the sword and new head sculp, the Megs just seems to be a metalic movie color accurate Leader class (it is said to have a new head sculp too, but pics seem to make this be untrue).
edit to add a few pics (thanks to seibertron.com for all pics)
The premium megs
Premium BB and Barircade

Premium Ironhide and Bloackout, note Ironhide has grey stacks this time! (DAMN IT:( )
Jazz
last but not least promo pics that show the Primes new head sculpt and the sword both unpainted in pic.
