A history of PLD's, CPLD's, FPGA's, etc...
Guide to use the PIC
the One Hour Xilinx design challenge using Xilinx's XC9500 series ISV CPLD
Optimagic's Programmable Logic FAQ
Available SPLD/CPLD/FPGA devices

Programming Xilinx's via parallel <-> JTAG connector (and implemented on a small PCB)
Description of BSDL files