Linked by Thom Holwerda on Tue 11th May 2010 23:11 UTC
Ah, Jakob Nielsen. Anyone who has ever been involved with serious document design or web usability will know his name. If you've never heard of him, the best way to describe him would probably be this: he's the Richard Stallman of usability. He has a set of very clear ideas about user interface and document design, which more often than not get in the way of beauty. He has performed a usability study, with real users, on the iPad.