Lazy usability links

Some links I've been reading lately and I'm to lazy to do a full post about each one:

• Breadcrumbs: a single line of text to show a page's location in the site hierarchy
• Why Apple study about screen size is wrong - That doesn't mean I don't want a big screen ;)
• Participation Inequality (90% of users are lurkers / 1% of users contribute)
• Progressive Disclosure defers advanced or rarely used features to a secondary screen, making applications easier to learn and less error-prone.