Ubuntu :: Can't Reach Wireless Network Configuration

In Ubuntu 9.10 (fresh install, not an upgrade from 9.04) on an ASUS EeePC 900, I was using wireless networking at home, which worked well. I took the netbook to work a few times and did not using it at home all that period of time. I connected it as a wired network (DHCP) at work, and it "just worked" fine (no configuration was needed). Now I tried to use it at home and wireless no longer works for all users. In System > Preferences > Network connections I can access the wireless configuration and it is still there, still with all the correct settings as worked before. However, in the network manager I access from the upper panel via the antenna icon, it now only lists a Wired network. The wireless network isn't in the list at all. No upgrades were done. I do those from home and tried to do one this morning but since wireless did not work I could not accomplish it.

I could hook it to a wired network, so if fixing this needs to upgrade something, that's doable (but I'd think it should not be needed since wireless did work before). I was going to try things like delete all networks and start again, but since that might lose information about a possible bug, I'm holding off.