Yeah, love Tomato for the interface. It's a firmware that I can recommend to friends because it isn't intimidating.
And though I, too, lament the lack of active development, I think that all of the open firmwares are a huge step up securitywise from the proprietary factory firmware that home/office routers use. I don't think we have many years left before the botnets move out of desktops and into the network infrastructure where they can much more effectively hide, and play man in the middle for an entire network in one shot.
Router manufacturers don't have any incentive to make great software or patch security flaws. They would rather that you buy a new router every few years, and they know most consumers aren't going to test-drive the interface before they do. Every consumer router I've purchased since 2002 (including Apple gear) has been buggy under everyday use. Not a good sign for attack worthiness.
To everyone pushing Open-WRT development (and Tomato, too!) thank you. This is hugely important work.