I run Tomato on several WRT54GL routers, but got my first Netgear WNR3500 about 2 weeks ago. It works great with TomatoUSB! Lots of memory headroom. And - finally - 802.11n and Gigabit support!
My only complaint so far is that the internal antennas can't match the range of my old WRT54GL routers when they had a 9dB external antenna.
Is anyone else having good luck with Tomato on an 802.11n platform?