We are working with RomRaider to develop effective antilag with the Stock Subaru WRX ECU. Matt can provide details but I think that this is available for 2.0 WRX ECU at the moment. We also can now tune directly to the ECU on E30 and E36 BMW, many Nissan, some Porsche, Evo, Honda etc..
The Honda stuff is old hat.
Here's a video of Matt and Bill testing the antilag on Bill's wagon. This requires no extra hardware so it would be an attractive option for autocross and hillclimb!
We have also been working a lot with Motec and Vipec as of late for those of you with race cars that are interested in exploiting the benefits of a stand-alone system.
matt's email is firstname.lastname@example.org