Well, I ended up building a logic analyzer this morning. I found an older laptop that I wasn't using for anything that had a parallel port and I built a simple analyzer out of a parallel cable. The design on the site called for a 74HC245 chip, which I didn't have, so I substituted it with some other chips based on how it was wired up. I ended up using 3 74LS04 Hex inverter chips and paired 2 inverters per input (8 inputs total) to create buffers, which is all the other chip was used for anyhow. However, I needed +5v and the parallel port was only providing about +3v, so I wired a PS/2 cable in to power the chips. I hooked it all up, tested and it worked (although it's still on breadboard for the time being). I still have much to learn about the I²C protocol, so that's what I'm working on doing now.