it was in the /private/etc/hosts file. you can put stuff in that file like:

127.0.0.1 0190-dialer.com
127.0.0.1 08.185.87.0.liveadvert.com
...

any address you don't want to ever connect to you put:

127.0.0.1 www.whatever.com

and then any attempted connections in your browser and maybe other software to www.whatever.com result in file not found -- i think it's something to do with the dns name resolving -- it can't get the right ip address -- i think the hosts file overrides dns name searches. something like that.

where did i get the list of data to put in that file? i think is what you might be asking - i got my list which contained limewire.com from a web page that explained how to modify your hosts file -- they had a hosts file made up for you with loads of common ad sites in, and obviously for some reason had limewire.com in. can't remember what site that was - it was a fairly amaturish one. i do remember that the host file was removed from their site, so isn't even available on there anymore.