"No network devices available" message in Network Manager upon booting up this morning

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http://askubuntu.com – I'm new here. Like with almost any problem, I've Google'd for and found my answers without requiring to bug the kind folks at Ubuntu Forums (and here). However, today, after spending about 6 hours last night installing Ubuntu (and Ruby on Rails + its dependencies), I woke up today and tried to boot the machine. Unfortunately, after having made wireless work without problem last night, it stopped working today. I know I should run a bunch of commands to show you what I'm working with, but with every command I see what I'd expect to see, except iwconfig. When I run iwconfig, the only devic (HowTos)