Cheap addressable RGB strip - how to control?

Very keen to hear an update on this when you've got something to share, Daniel :-). Just about to order some of these strips myself, for this year's project.

Any first-hand info on the voltage for these strips, by the way? Is it 5V everywhere, or 5V signalling and 12V to power the LEDs like the LPD6803 strips I used last time?