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).
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.