We've been talking about it, but the Dart Tag Speed Swarm is looking very much like the real deal. SG Nerf have got their hands on a unit, and though there's no "official" press release yet, I think it's pretty much the real deal. Seems to be very much a mini Swarmfire- from SG Nerf's post:
"The Nerf Speedswarm is a fully motorized spring-powered direct plunger blaster. The blaster requires 6 x AA Batteries to power its motor (Batteries sold separately). Its rotating barrel has a 10-dart ammo capacity.
Its firing system is fully motorized, there is no manual priming mechanism (without any batteries, it cannot fire).
The Speedswarm can fire in full auto or in bursts, depending on the duration of trigger pulls. Firing single shots at a time can also be done by simply pulling the trigger briefly and letting go. Its all in the timing of the trigger pulls."
More pics at SG Nerf.
SG Nerf: Nerf Dart Tag Speedswarm - Review