Andy Kunz wrote:
>
> Does anybody have an I2C bus snooper?
> I don't, and though it's something I'd love to have,
I reckon it will take a fair bit of work.

You'd need some hardware to capture and hold the states,
from at least two directions.
Presume a PC would be capturing the data flow,
much like RS232/485 protocol analysers.

If you do embark on such a project I'd be glad to help.