[NCLUG] Need help identifying a mystery network

[Marcio Luis Teixeira]

Today I just received a 802.11b card and set it up on my laptop. I do not have 
an access point at home, so I wasn't expecting to get a connection, but much 
to my amusement I got a moderately strong signal and my machine was assigned 
an IP address via DHCP (though, alas, I cannot connect to anywhere). The 
network name is "linksys", which I assume is the brand of the wireless access 
point. Anyhow, I'm a bit curious to know whose network I'm getting connected 
to, but so far I haven't found anything out. The IP address I get assigned is 
a class B address in the network 169.254.0.0 . I did a "whois" search and I 
get the following information:

IANA (NETBLK-LINKLOCAL)
   Internet Assigned Numbers Authority
   4676 Admiralty Way, Suite 330
   Marina del Rey, CA 90292-6695
   US

   Netname: LINKLOCAL
   Netblock: 169.254.0.0 - 169.254.255.255

   Coordinator:
      Internet Corporation for Assigned Names and Numbers  (IANA-ARIN)  
res-ip at iana.org

Does anyone know who these people are? Why do I end up on their network? I 
really doubt I'm getting a signal all the way from California :) Do these 
people outsource IP addresses to some local access provider and perhaps one 
of my neighbors subscribes to that provider and has a wireless access point 
in their home? Do any of you guys recognize the IP address as belonging to 
some local ISP?

Also, are there any techniques or software that I can use to find the source 
of the signal? I think it might be a fun project to drive around in my car 
and try triangulate the source of the signal, perhaps based on signal 
strength (or, I could, alternatively, get a life, but that wouldn't be nearly 
as much fun). Then I could knock on their door and tell them to lock down 
their network so bored people like me won't keep mucking around with it :)

Marcio Luis Teixeira