For some of you do-it-yourself at home techs,
here's an interesting tool that you use on your home computer to get codes for OBD II compliant cars. I don't have money right now to pick one up, but in the future, I may pick one up, especially since my family has two other Toyotas that I know definitly works with them. You can check, and clear codes with this thing apparently and from what I heard, it's a pretty good tool. Don't know though if it will interface into Hondas or not.
PS...download the program and run it (you don't need the tool) it will show you a sample of what it does.
Ooh...
here's another good one