Uncovering Hidden SSIDs Using Wireshark

If there are no associated clients, you can brute-force the SSID with MDK3 http://www.backtrack-linux.org/forums/showthread.php?t=12360

And mahouse is correct: airodump-ng automatically detects when the SSID is broadcasted and displays it.

Doesn't airodump-ng do this by default?

Yes it does, even with a neat curses based interface IIRC. No need for wireshark at all.

I just wish airodump-ng's curses interface paid attention to the height of my terminal or provided a way to scroll.

Neat, but you can do the equivalent with tcpdump and grep, right?