The Linksys WRT54G, is a 802.11g wireless access point and router that includes a four-port 10/100 Ethernet switch and can be bought for as little as $69.99 according to Froogle. It comes with a 200 MHz MIPS processor, up to 32MB RAM, and up to 8MB flash RAM storage. The Linksys router uses Linux as its operating system, and publish its source code under the open source GPL making it free for anyone to download
Here is the cool part, by using Sveasoft firmware you get all the original Linksys functionality; plus: SSH, Wonder Shaper, L7 regexp iptables filtering, frottle, parprouted, the latest Busybox utilities, several custom modifications to DHCP and dnsmasq, a PPTP server, static DHCP address mapping, OSPF routing, external logging, as well as support for client, ad hoc, AP, and WDS wireless modes.
Wonder Shaper is a traffic-shaping utility that does a very intelligent job of prioritizing packets to dramatically improve the usability of almost any broadband connection. Frottle's job is to cure the hidden node problem that was left unsolved in the original Wireless Distribution System (WDS) 802.11 specification from 1999. Hidden nodes are wireless clients or access points that are out of range from one party in a client-AP data transfer. 802.11's CSMA/CD technology assumes that all parties can listen on the line and avoid collisions. The box also supports OSPF mesh networking, which allows distant clients to reach edge nodes by hopping through other clients en route.