This is the watch I'm talking about: http://www.thinkgeek.com/gadgets/watches/9313/
I bought this about a month ago since my last watch broke. I've used it for it's Wi-Fi detecting ability a few times at work, home and school. The wireless detection works well and gives a good representation of how strong you can expect the signal to be. Even though it doesn't give any details regarding the name of the network or whether or not it is secure, it is able to tell you what the signal strength is. This is the first watch I've seen with this ability and it works well. The backlight looks good and stays on for 4 seconds, the watch also has the ability to keep track of different time zones and daylight savings time, and has a stopwatch and countdown timer. It's cool, you should get it.