* Io Has A Very Clean Mirror - http://web.archive.org/web/20080212010904/http://hackety.org...
* Lazy Bricks, Lazy Mortar - http://web.archive.org/web/20080430135919/http://hackety.org...
Unfortunately they're only available via WayBackMachine.
Other useful links:
* Io notes - http://iota.flowsnake.org/
* Io sub-reddit - http://www.reddit.com/r/iolanguage/