My router keeps giving errors about demon being down (see log). After about an hour (sometimes every 10min) the router reboots. I have a Westell UltraLine Series3 with Software Version 1.02.00.04 Release Date: Aug 28 2008
"daemon.info LAN-en2210: link down, device will be down"
Because it says LAN en2210 that sounds like a problem with one lan port going down. that could be a bad cable, or a bad port on the router. Try unplugging it from whatever port you have it plugged into (1,2,3,4) and plugging it into a different port, and if that doesn't work try changing the cable.
When the router goes out, do you ever lose your internet light or your WAN light? (it will either be wan coax, or wan ethernet, (never both)