I thought I'd get that in before too many other people do. I have better justification than most, as I *am* Jon Skeet. I saw the list yesterday, and we've been gently laughing about it at work.
Somewhere, the difference between fame and accomplishments has been lost. Don't get me wrong, I'm not a bad coder. I'm pretty knowledgeable about C# as a language, although details of writing *applications* in C# is a different matter. I'm pretty good at expressing technical concepts, and that's really useful in various contexts (Stack Overflow, books, screencasts, and of course work). But none of these are a patch on what some of the others on the list have accomplished.
As a Googler, I know a *bit* about what Jeff Dean and Sanjay Ghemawat have done - and it's obvious I'm not in the same league. The code I'm probably proudest of is Noda Time (my .NET date/time library) which has a few thousand users, if that. I hope I've had an impact everywhere I've worked, but it just isn't on the same scale as many of the other members of the list (let alone the many thousands of other notable programmers).
It's pretty clear I'm not actually on the list because of my coding skills - it's just due to Stack Overflow reputation. That indicates *something*, but it's definitely not the kind of measure you'd sensibly use to compare two programmers. Just as I'm proud of Noda Time, I'm proud of being able to help a lot of people on Stack Overflow - but I'm not under the delusion that even that's on the same level of impact as an awful lot of other coders.
For what it's worth, if I could substitute one other name for mine, it would be Eric Lippert. I'm not sure he's really be in the "top 14" or even whether that's meaningful - but I'd say he's at least *more* worthy of being there than I am.