I upgraded one of my Linksys WRT54G Routers with the DD-WRT software. It’s been running a couple of days now and is really great. It replaces a mediocre interface with a clean functional and usable interface. So far the router has also been reliable and extensively used for voip calls and general wireless connectivity.
The DD-WRT puts a slimmed down linux onto the Linksys access point. It even comes with a netflow export feature which is very cool.
Here’s a picture of the interface in action: