The WRT54g is a Linksys router/access point with a Broadcom 802.11g chipset.
It is an interesting device for tinkering with, since it runs a modified Linux distribution and the sources are generally available.
Resources:
Generic:
Firmware variants:
- Tomato, a very nicely integrated system.
- wifi-box
- DD-WRT - RADIUS auth, interesting traffic monitoring
- Sveasoft, another source
- OpenWRT (Matt Croydon's notes)
- EWRT
- LinksysInfo - a bit chaotic.