But I ran into an domain verification issue when I tried to update/push a repository as listed in their docs.
So I did a bit of dig and found this:
~ » dig bitbucket.org
<snipped>
;; ANSWER SECTION:
bitbucket.org. 36584 IN A 207.223.240.182
bitbucket.org. 36584 IN A 207.223.240.181
OK. So two IPs there. I visit those IPs and they show what seems like some usernames that have zero activity and seem suspicious (to my paranoid brain atleast).
Last I remember, which was about a couple of months ago, 182 was fetching the proper bitbucket.org pages. But even that seems to show up some username created in Dec 2012(!)