If you had a laptop, pj (but I know that you don't) you could wander the neighbourhood on a nice day such as this - trying not to look like a potential wardriver! - as you frequently refresh your list of wireless connections to pick up roughly where it's at its strongest. You can also get (free?) software that measures signal strength, but that's a bit academic as I wouldn't recommend that you drag your desktop around the neighbourhood!
Not much else that you can do really, other than knocking on a few doors and asking. It's good of you to think about this, though!
It can vary a lot. The maximum internal distance for an 802.11g signal is up to 30m, but it can travel quite far once it's unencumbered by walls. My back garden is about 80ft and there is a network beyond that (160ft away) that I can sometimes detect if I'm in a back room.
You could send a message to that network by programs specified for that task ... you wont be doing nothing illegal .... cause you are only sending them a message to the network but not using the network such a program is this : click here (i dont know if it works for wireless)just try it or try to find other programs for the task
sorry that i could not give you more info .. cause i m lack of resaurces
It is illegal to *connect* to a wireless network without the owner's consent. Prosecutions have been brought in cases of illegal misuse, and it could reasonably be argued that one would have no legitimate motive for connecting to a private network without consent. This law is - I understand - incorporated into ammendments to the Wireless Telegraphy Act.