I just bought one of these routers for $25 to mess around with, which
can run opwnWRT:
http://wiki.openwrt.org/toh/tp-link/tl-wr703n
I plan to use it as backup internet at Startup Weekend, but also to
build a file-sharing appliance:
http://wiki.daviddarts.com/PirateBox_DIY_OpenWrt#Install_PirateBox
I've seen clones of this as cheap as $13. It's a 400MHz mips-based cpu,
and might be good as the brains, and wifi connectivity, for hardware
projects (like DIY drones), by sticking a USB-capable arduino in the USB
port. Much cheaper than an arduino wifi shield which go for as much as
$90 (
http://www.sparkfun.com/products/9954).
Anyway, we also talked on Tuesday about routers, quality of service, and
how the HackerspacePP internet has been choppy the last couple of weeks.
This article came up on the feeds:
http://www.codinghorror.com/blog/2012/06/because-everyone-still-needs-a-router.html
If we wanted to improve the hackerspacepp internet (eg QoS,
traffic-shaping, local dns server, traffic monitoring etc), openWRT or
one of the others would be the way to go. There are a couple of other
recommendations for actual hardware in the comments, I know this one is
available in PP for about $55:
http://wiki.openwrt.org/toh/tp-link/tl-wr1043nd
Plus I now have some (hair-pulling) experience with openWRT!
Just sayin'
Jack.