IRAssitant - Useful utility that allows the use of various Infra Red and other remotes to control a PC (freeware for home use)
LinITX forum - Mostly linux chat but useful tips on ITX hardware
SFF Tech forum - Interesting forum for small format and home theater projects.
Nebula - DVB card manufacturers
Hardware sensors monitor - adjustable temperature display for the P4-ITX board
Wexim - IrDA interface (JM100)
DigiTV Forum - Independent forum dedicated to the Nebula product
Inmatrix Zoom Player Pro - Amazingly versatile media player easily controlled from the Nebula remote.
EPIACENTER - A website dedicated to all things mini and nano-ITX