This is easiest to spot in Netscape, by going to view-pageinfo.

You won't find it in the HTML source for their pages, because it's injected via Javascript include.

It's a 1x1 pixel image that appears to be collecting browser info.

What really concerns me is that the domain name used appears to be constructed to put people off the scent:

192.168.112.2O7.net (that's an o not a 0) so their use of a capital hints that they want you to do a whois on the totally unrelated 207.net instead of 2o7.net.

Browser info sent to them includes screen resolution and colour depth, browser window size, browser type, javascript version, and other stuff I cannot decipher.

Javascript hackers might have more luck. THe javascript is at http://include.ebay.com/aw/pics/js/stats/ss.js

There is no website at http://www.2o7.net which makes it all the more bizarre.

So why would eBay Canada be using a service that goes out of it's way to keep itself a secret?