Hey there
I need:
a PLCC84 through-hole socket
or
a PLCC84 to DIP adapter

HKN used to have one of these, but someone else must've bought it.
The DIP adapter is a green PCB, with a ton of headers on it and a PLCC84 socket.

What are you building this time?

Just need to put a cheap Xilinx FGPA onto a breadboard

What is the advantage of an FPGA over a microcontroller?

http://www.ece.msstate.edu/courses/design/ece4542/2003_spring/av_switchbox/rd/Microcontroller%20VS%20FPGA.pdf

This has a pretty straightforward list on the first page.

A uC can only perform one operation at a time. In an FPGA, you can perform as many or a few simultaneous operations at a time. You are only limited by how much physical space you have available on the FPGA (and a couple other deisgn considerations, but you get the point).

I designed a small processor, turing complete, only does one instruction, and I plan to implement an 8bit version in 74 series gates, or maybe 4xxx CMOS.

If you haven't already, try and find one of the officers of HKN. They may be able to get you one for pretty cheap. This is purely speculative, as I have an extremely limited understanding of the workings of HKN, other than they often provide parts kits for some EE classes. I don't know any names either, so good luck.

HKN is the best for hobbyist electronics. Totally worth the $20 or so I've spent for Hobby Club membership over the last four years.

I just joined HKN this semester, I think elections are next week, if you want to wait till then I can get you the info for the new Hobby Club chair.