OT: I just noticed that WordPress uses "w.org" -- how did they manage to obtain a single-letter domain name?

I found something online about an auction of single-letter .org domain registrations as a fund-raiser,[1] but I haven't come across any others in use and a few random checks turned up nothing (except x.org of course -- how did they obtain theirs?). This person claims to know some of the story, posted to a blog apparently owned by Matt Mullenweg.[2]

[1] http://www.project94.org/

[2] http://wptavern.com/how-wordpress-obtained-the-w-org-domain

I can't find their changelog (http://codex.wordpress.org/Category:Changelogs), anyone else know where it is?

Its there, just not published to that page yet. See http://codex.wordpress.org/Changelog/4.0

I wonder if Wordpress includes (in core or as a plugin) a static site generator yet? This would cure great many users from Wordpress-related troubles :)

Caching plugins basically mimic a static site (e.g. wp-super-cache).