In June 2005, Apple started the WebKit Open Source Project. WebKit is the basis for Apple's web browser core which powers Safari. The open source project has drawn programming contributions from non-Apple employees providing constant improvements to the core of Apple's browsing technology.
As a "Thank You", Apple is giving MacBook Pro laptops to 12 of the top contributors to the project, and 5 are being invited to Apple's 2006 World Wide Developer's Conference "on Apple's dime".
More information on WebKit can be found at http://webkit.opendarwin.org/