Sony announced its first slim, portable and external Blu-ray rewritable drive, the BDX-S500U, that can be used with notebooks, netbooks, and desktop computers.
It can write BD-R discs at 6X as well as dual-layer and rewritable Blu-ray discs at 4X and 2X which means you can record a 25GB disc in about 20 minutes.
The drive should be available later this month but as of right now, no price has been given.