Before anything, I'd like to recommend you check out Mortar's detailed pre-release guide to pretty much everything - he put 200 hours into the demo and knows a hell of a lot about the inner workings of the game.

Okay, movement!

Probably the fastest bit of tech right now is the Angled Slide, which essentially just means you need to hold forward + a strafe key and slide - boosting you from about 850 units/s to 1400 units/s. Keep in mind, you'll lose this speed fairly quickly so make sure you end the slide before dropping below that 850 units/s mark.