Linux Backups: Do I backup /dev?

When doing a complete backup of your system, I know you should ignore /proc, /lost+found, and /tmp.  I thought /dev was a virtual filesystem like /proc.  Should I backup /dev, and can I use tar for this (will tar do stupid things like copy my whole hd when it hits /dev/hda and stuff?)

I'm not trying to do a image backup, but be able to recover to near-exact state after reinstalling operating system if it's needed.