[gknoy]

I find myself going between Digitally Imported's "Epic Trance", "Vocal Trance", and "Hands up" stations [1], but as soon as I can find my Tron Legacy soundtrack I'll be listening to the "Sea of Simulation" track on infinite loop.

1: http://di.fm/

[peterwwillis]

I like some ambient drum&bass for a similar sound, but a little more energy to keep me focused.

http://www.last.fm/listen/group/Atmospheric%2520Drum%2527n%2... http://www.youtube.com/watch?v=ZzoY_eEnnac http://www.youtube.com/watch?v=6ziP7iMCAok