Are these USB MCUs? I don't have a lot of experience with the 18F series, but I could always use them for something sometime down the road...

These are the "-I/P"s, so they're 40DIP MCUs. I've noticed something about the numbering of the 18X MCUs that's not similar to the 16X series-the 18X1XXX's are 18DIP (or 18 pin SMT), the 18X2XXX's are 28SDIP (or 28 pin SMT), the 18X4XXX's are either 40DIP or 44 pin SMT, and the same with the 18X6XXX's and the 18X8XXX's, 60/64 or 80 pin SMT's respectively. I just noticed that numbering pattern while browsing through microchipdirect.com one day...

Anyway, I've got quite a few of Microchip's 24LC256's. I bought them in bulk from Digikey in an attempt to save a few dollars a couple of months back and I haven't really used many of them since. Would you be interested in those? I've also got limited quantities of 24LC512's and one or two 24LC1025's, but I have plans for the stock I have of those. If you'd be interested in the '256's, we could do some trading with some of those...

In the meantime, I'll download the datasheet for the 18F4553 and browse through it...

-Adam Collins