looking for info on the tweker

You mean TwEECer?

try http://autos.groups.yahoo.com/group/tweecer/ and http://www.tweecer.com/

also www.eectuning.org If you get it, bineditor is a lot easier to use than calcon/caledit

I run a tweecer in my car. It works very well for me. The learning curve is very steep and it will take a lot of reading and research to get everything right. If you dont care to put that kind of time/money into it...i suggest you just get a custom flip chip/SCT chip burnt for your car at a dyno tune session.

Here's the cost breakdown for a good tweecer setup:
Tweecer RT: $550
Binary Editor and EEC analyzer software licenses: $110
Wideband O2 sensors: $200

So by the time you are done you are almost 1000 bucks into it...and you could get a custom chip burnt for half of that!

BUT...the tweecer gives you the ability to tune the car yourself and the satisfaction of knowing even more about you car and what makes it run. I love it!