Found this little freeware program the other day...sits in tray and tells you IP address, LAN address & all sorts of tidbits about your own info.
On their web site, they list: surf anonymously. Have tried it a few times and hoping someone else could check this out & see how anonymous it really works.
Personally, I don't like having programs like this sitting on my system.
I deal with several proxy manufacturers who have turned me onto programs
that are accurate, informative & non infringing being web based.
They are also FREE!
Give either site a try, iptect or browserhawk