I can understand that DD-WRT might be a worthy candidate to review. But if you read this forum thread , you'll get worried about the security focus DD-WRT have. On the fourth thread mentioning of some odd iptables rules, one of the developers responds. And their answer is basically "noticed, fixed, will come in the next release" ... no further clear message about when, or indicating for current users that there is an issue and how to fix it.
After this thread, I'm not even going to consider DD-WRT, unless they change their security attitude and prove it by acting differently.