The original WRT54G was first released in December 2002 by Linksys. This router made its mark and has been the standard for home wireless routers ever since.
Supporting both 801.11b and 802.11g, Linksys was able to take home wireless network up to 54gigbit etherent. The WRT54G also comes with a built in 4 port ethernet switch to allow plenty of wired connections as well.
The WRT54G also became very popular with the tech folks, who quickly found out that they could "hack" the router and modify it to improve the performance. New varieties of firmware have started showing up on the Internet and are now very popular, like DD-WRT and Open WRT ,which can replace the built in operating system on these routers. (Please note, upgrading firmware can be tricky and is for advanced users. You can easy turn your new router into a brick. So be careful!)