> WebKit was open sourced roughly a week (June 7, 2005) before Nokia announced the port to their phone (June 13, 2005). That means that Nokia was able to do the port in less than a week with (presumably) a few competent developers.
While the ex-Nokia developers I've met have all been excellent engineers, they certainly didn't port WebKit to their mobile devices in under a week. June 7, 2005 marks the date that Apple started WebKit as an open source project. That is, on that date the CVS repository and Bugzilla instance were made publicly available. For over two years prior to that point Apple had been publishing the source code of the two main components of WebKit, JavaScriptCore and WebCore, alongside Safari releases. Nokia's port of WebKit to Symbian was based on those releases, and it wasn't until late 2006[1] that Nokia started developing against the current WebKit SVN repository.