Deep down we all knew it was coming, but it still was a huge shock when I read it.
Very sad news. As someone else already said on a different site, he was our Thomas Edison and will be looked back on as someone who revolutionized a huge chunk of the technology sector. Probably a lot more than we realize right now.
On a personal level, he's responsible for letting me enjoy my computer again when I switched to Mac, after years of hating having to fight my old system all the time.
So much bad news as of late.