If you use DD-WRT update it NOW!
A practically emberassing bug in dd-wrt was released today. It would allow anyone to get root access to your router if you have remote Web GUI turned on, which is always a bad idea. If you don’t, anyone on your internal network could get root access pretty easily. Details on the bug are on milw0rm at http://www.milw0rm.com/exploits/9209. The people who make dd-wrt released a patch to fix the issue, so if you’re vulnerable, I suggest you fix it ASAP.