I've got a Durametric scan tool that interfaces with my laptop. It's more expensive than the cheap scanners you can get on that auction site, but it does much more than most other scanners. Check out
http://www.durametric.com for info.
Sorry, but it won't work on your 328.
Also, if you end up getting a Durametric and you're willing to help out someone with a check engine light, airbag light, etc., please add your name to the "Global Durametric/PST2 list" in the Technical forums on this site.