Netgear WNR3500L
From DD-WRT Wiki
CAUTION:
This router REQUIRES a K26 build. All of the K26 builds have "_K2.6_" in the filename. If you need a firmware recommendation refer to the Firmware Recommendations thread and make sure to get a K26 build.
Flashing the router
Here is an article for how to flash the dd-wrt firmware onto the WNR3500L: [1]
DeBricking the router
And another article on de-bricking your WNR3500L with a USB-TTL cable: [2]