Neat visualization of the internet. It would be great if there was an option for automatically closing each popup when you click on another site (I ended up having lots of open popups). Probably a subjective preference to be honest.
I was expecting a map of the network infrastructure (i.e. the Internet) but it's an interesting visualisation nonetheless. Was surprised to see how big Yahoo still is considering their market share is pretty constantly derided by the tech press.
Wordpress.org has a bubble very near the center, north-northeast of Google and west of Facebook. It's much nearer the center since that's where all the linking and blogging happens.
Out in the void to the northwest is wordpress.com. This appears to be a freemium service based around Wordpress the software. Presumably this one is far out because there's fewer links and connections to it, and presumably only by those who find the .com first and don't realize .org is the "true" Wordpress home.
There are also multiple bubbles for Google, Yahoo, etc..., it's just how they chose to visualise it. Wordpress.com is fairly popular, but is its own entity compared to Wordpress.org (the only major link is that Wordpress.com was started by a co-founder of the Wordpress project).
I don't think the locations are random. I checked zerohedge.com and all around it were "buy gold" and other end of the world finance sites. Seemed like too much of a coincidence if the sites were randomly mapped out.