Is it possible to synchronize wireless network passwords between multiple computers running Ubuntu? It would1 save me a lot of time if I didn't need to re-enter every wireless password whenever I started using a new Ubuntu installation.
There may be some obscure way of doing this - there usually is with Linux!
However, what I do is to use LastPass with Firefox. It stores browser passwords but also has a secure note facility. Because it is the first thing I install, I effectively use it for sharing key settings including passwords.
Of course, this doesn't help if you have to install machines using only WiFi! In that case, I recommend simply putting the password in an obscure text file on a USB key while doing installs, then delete it. To add security, you could use a cross-platform security tool such as KeePass. Just make sure that you have the appropriate platform application on the key as well.