yup, should be one coming soon.
With speed being one of the Ork's main ways of war, I think that that kind of playstyle will either remain unaffected or buffed in the next codex. That is good news for you, as Speed Freak armies have always been highly competitive.
If you want to kick off a Speed Freak element, then start with two Trukks. Trukks are good - they only cost 35 points each, and they are assault transports thanks to open topped. Just mind where you place them on the board - to say that they are very fragile is an understatement...
Before mine got stolen in purely Orky fashion, my Deffkoptas had a pride of place in my lists. Load them with Rokkit Launchas and send them outflanking to hit your opponents tanks from the sides... Nasty tactic that almost always works to destroy enemy armour.
Normal bikes are a must. When they are shooting they are like Ork Shoota boy squads (but better), in an assault they are like Choppy boyz (but better). Best of both Ork worlds, all on a nice, rusty, fast and suspension-less bike.
Don't have one of these myself, but Battlewagons don't fail to disappoint. While it is slow compared to all other Speed Freak units, it can load up 20 boyz or whatever you want to load it with (don't bother with the Killkannon here). Its front armour value of 14 also keeps it nice and shiny until the boyz inside it cover it with the blood of whoever they just murdered when they leapt out of it.
Those are the good units to start with. Just try not to go crazy - we don't know what is coming with the new codex...
G.A