Where is the code for Aperture? Final Cut Pro? Numbers/Pages? Even iTunes? I also want to see the code for Google's page rank, BigTable and gmail.
I also want to see scribd code for converting MS Office documents to iPaper. 90% of their solution consists of Open Office code that they took freely and haven't released theirs in return.
I wouldn't say that WebKit is worthless; its the primary rendering engine behind several browsers - which are gaining in popularity due to the success of OSS in general.
If the web was so worthless, MS wouldnt have bothered with IE and Netscape wouldn't have open sourced the code for Mozilla. Nor would a majority of the HN startups exist for that matter.
Besides, I can think of lots of projects where employees at corporations and "commercial companies" are being paid to work on OSS projects. I frankly doubt that OSS would have gone this far without such people.
The biggest part of the OS that isn't open source is Aqua. But, really. Thats just the UI. And I'm always hearing about how good Compiz Fusion is supposed to be. So, shrug.