>Has anyone ever seen a project such as this in an electronics
>magazine or anything?  How about just buying a IC2 card for a PC, is
>there such a thing?

ELEKTOR Electronics USA , a european (or Brit?) mag.
available for a while in the U.S. has Feb. 1992 "I2C Interface
for PC's" using the Philips PC8584. They provide ISA board
layout (and boards for purchase). Some follow-on articles
used other Philips I2C parts on a DIN-6 daisychain bus.

I have the article, but it's pretty simple: 74HCT688 + dipsw. for
address decode and a couple of the 'usual suspect' TTL glue
chips for ISA bus interface. Checkout the Philips website
for part descr. and maybe app note.

I started to sell a PIC based ISA card a while back. There are
other vendors (check Web) including maybe even VB drivers.

R.Martin