Recently I made a custom Tomato firmware mod with included basic USB and NAS support. Although this forum is mostly dedicated to Oleg's and Asus official firmware, I finally decided to register and post here since most USB-enabled routers are now made by Asus, and my mod will provide another alternative to Asus owners. Hopefully it's not inappropriate to post it here.
First of all I would like to thank Oleg, lly and other developers who are working on a new firmware here for making this project open source. I've been looking around for good solutions and fixes, and using some of your patches and code really helped me a lot in making my mod better.
For those unfamiliar with Tomato firmware, the official Tomato homepage is http://www.polarcloud.com/tomato. My USB mod and related discussion can be found on the Linksysinfo forums.
Of course, even with USB additions, Tomato doesn't include many of the features available in Oleg's firmware. There's no SNMP, no support for USB serial devices, webcams, modems etc. With my USB mod I'm only focusing on printing and storage support. On the other hand, Tomato has nicier GUI, and arguably the best QoS implementation among all the available open source firmwares with very good graphs to go along with it. Depending on your needs and preferences you can choose one or the other - but I believe it's always better to have more choices ...
If you want to ask questions it may be better to post them on the existing thread on Linksysinfo forum rather than here - I'm visiting it more often, and there's already a whole subforum dedicated to Tomato there.