eec-tuner

Paul Riva uses one.

I don't think they are as capable in the data logging department as the Tweecer.

As for manipulating the values in the pcm I don't think there would be any prob with them from what I've seen.

Been a long time since I hung out on their site.

Here is their support site if you want to do a little research.

http://groups.yahoo.com/group/EECTuner

Later
Grady