Do note that I thought I read that tomato was no longer under development.
the original tomato is not, but it works very well. The original tomato only runs on old school broadcom based WRT54's, not anything newer.
there are a few forks, notably "Shibby" and "Toastman" that are under active development, and run on a wider range of routers
http://tomato.groov.pl/ http://toastmanfirmware.yolasite.com/
-- john r pierce 37N 122W somewhere on the middle of the left coast
Yup John's correct, the original is no longer maintained but there are many forks and some in active development. If you want to stay with that then you just have to find the one that fits your situation etc.
For most of my friends and clients I have migrated to pfsense on thin client hardware, makes a great firewall device, fairly small and low power but lots of options if wanted or needed.
Just my .02 ;)