Some links to stuff I feel is worthwhile:
Great resource for Motorola commercial radio hacking.
Message board for Bat Labs.
Information on trunked radio systems. Frequencies, talkgroups, and decoding software.
Equipment and instructions for ATV (Amateur Television.)
The first place I go when trying to look up a call sign. The msg. boards are full of lids though.
Lots of equipment reviews and good articles. See above link about the msg. boards.
Need any Anderson Powerpoles for ARES/RACES compliance? Here's the cheapest I've seen.
Makers of the RIGblaster and RIGrunner. See above for RIGrunner purchasing though.