MyOpenRouter writes "Netgear has announced the WNR3500L, a brand new, open source, wireless-N gigabit router customizable with third party firmwares. MyOpenRouter is the dedicated source for Netgear open source routers, with the full scoop including a review with screenshots, how-to's, tutorials, firmware downloads, etc. Here's a review and the downloads page."
The router can run popular open source firmware including DD-WRT, OpenWRT. and Tomato. It will list for $140.