Forgive me if this has already been posted, but AEM is apparently going to try to hit the market with a wideband unit that costs "significantly less than any comparable unit." Here's the thread...
http://www.aempower.com/bbs/viewtopic.php?t=3305

To sum the 5 page post, they're shooting for a release date of 6/10/03 (though I wouldn't hold my breath on that one... ). A single channel including the Bosch sensor is supposed to be $482, and a dual channel (2 sensors) is supposed to be $714. They're supposed to have both 0-5v calibrated output and 0-1v outputs. There isn't any type of display included, although it's "in the works."

Sounds enticing.....that is, till I wander over to the AEM ECU forum here and see the trouble they're having...