Thanks to DD-WRT can actually just about every conceivable feature that runs on a Linux system porting for embedded systems.
Thanks to OpenVPN client + server on the router can now all clients without a separate VPN setup to access network resources.
I especially like that Wlans can operate on 2.4 GHz and 5GHz simultaneously.
For How to flash best on Google times after looking "tomatousb N66U".