I successfully flashed my Netgear R6250 router with the Tomato by Shibby's "Initial build". Upgrading to 129-AIO-64K, I guess I failed by ticking off "After flashing, erase all data in NVRAM". Having rebooted version 129-AIO-64K, the device responded at http://192.168.1.1, but did not accept any of the usual username/password combinations.
Hoping to be able to telnet to port 233 and get in without a passward, I tried holding down the wifi button for 25 seconds, both 3 seconds after power on, after full boot and from power on, without success. Then I tried the same with the rest button, but now the device does not seem to respond to any network requests at all - not even ping.