Wireless works, wired doesn't [Debian 6.0.7]

[Alexander Kapshuk <alexander.kapshuk@gmail.com>]

Howdy,
Upon starting my PC, wireless networking was found to be working, but not the wired one.
/var/log/daemon.log says DHCPv4 request timed out. Canceled DHCP transaction.

What could be wrong here?

Thanks.