I used to go to a webpage that told how all these companies get your inforamtion by just visiting their webpage. It had interactive examples and everything. It was quite an informative site. I was just telling a friend about it, and I can’t remember the name of the site!!. I’m going crazy, cause it was a simple name too. If anyoen knows this site, your Karma will explode with goodness.
I think the address you are looking for might be http://snoop.anonymizer.com/ . Actually, the site is http://www.anonymizer.com, but the page that shows you what it finds when examining your browser is the snoop.anonymizer.com address.
This sounds like Shields UP!
Cool!
From Anonymizer:
That oughta confuse them! 
Actually it’s iCab. I have it set to report itself as Netscape 4 because a lot of sites diverge according to whether you’re using Netscape or Internet Explorer, and browsers that report themselves as iCab, Opera, OmniPage Pro, etc., are often subjected to spurious “You must upgrade your browser to be able to use this site”. I don’t know why JavaScript reports me as being on Internet Explorer. Could be an error in iCab (or an intentional setting to make our JavaScript as compatible as possible with sites that check), could be an error in Anonymizer’s JavaScript testing routine (especially if it assumes IE unless it can detect a flag identifying the browser as one of the others it knows about).
From ShieldsUp:
Test My Shields:
(My NetBIOS is courtesy of DAVE, which is up and running )
Probe My Ports:
Hehe … this is what I got from Shields Up’s analysis:
*Your Internet port 139 does not appear to exist!
One or more ports on this system are operating in FULL STEALTH MODE! Standard Internet behavior requires port connection attempts to be answered with a success or refusal response. Therefore, only an attempt to connect to a nonexistent computer results in no response of either kind. But YOUR computer has DELIBERATELY CHOSEN NOT TO RESPOND (that’s very cool!) which represents advanced computer and port stealthing capabilities. A machine configured in this fashion is well hardened to Internet NetBIOS attack and intrusion.
AND
** Unable to connect with NetBIOS to your computer.**
All attempts to get any information from your computer have FAILED. (This is very uncommon for a Windows networking-based PC.) Relative to vulnerabilities from Windows networking, this computer appears to be VERY SECURE since it is NOT exposing ANY of its internal NetBIOS networking protocol over the Internet.*
My computer is as secretive as I am!! 
Harumph. Here are my results:
Your Internet port 139 does not appear to exist!
Unable to connect with NetBIOS to your computer.
21 FTP- Stealth! There is NO EVIDENCE WHATSOEVER that a port (or even any computer) exists at this IP address!
23 Telnet- Stealth!
25 SMTP- Stealth!
79 Finger- Stealth!
80 HTTP- Stealth!
110 POP3- Stealth!
113 IDENT- Stealth!
135 RPC- Stealth!
139 Net BIOS- Stealth!
143 IMAP- Stealth!
443 HTTPS- Stealth!
445 MSFT DS- Stealth!
5000 UPnP- Stealth!
Hmmm, maybe I’m not really using a computer at all…
Try the anonymizer test, but be prepared to wait! I waited a long time for the results, but was surprised by how much it could do. It launched Explorer and Regedit and a couple of other programs. I don’t accept cookies, so that limited it somewhat, but I was still amazed at what it showed me when it finally returned.
Don’t give up because it takes a long time. If you use a Windows machine I think you will be shocked by what it returns and the information grabbing doesn’t really take this long. It’s just an overburdened server.