What a poor list! It has a couple of really good people on it, and rather a lot of over-hyped also-rans. It omits people who are far more relevant to modern programming than many it includes.
I'm happy to see Donald Knuth and Simon PJ on this list; probably Ken Thompson too (in response to an earlier commenter: I would rather listen to the man who invented B than the man who invented C; and thank heavens Stroustrup wasn't included - few have ever dragged the art of computer programming as far backwards as he did, even Ritchie achieved less damage that Stroustrup).
I think John McCarthy would have been a better choice than Guy Steele. And I'm very surprised that Zawinski was preferred to Stallman, since the former's work is built on the latter's and doesn'y add all that much.
Many of the others on the list are, I guess, fashionable - more fashionable than people who contributed far more stongly to the art of programming. it's a pity that no-one like Tony Brooker or Peter Naur is included - either one of those would be worth reading about more than Bloch and Crockford lumped together.
As a litmus test for employability, I would rate the ability to name someone listed in the book and say what they are famous for as having a negative worth. Changing the test as Phil Factor suggested, to (asking someone for example if they could identify what Don Knuth was famous for) would make a lot of some sense; providing a list of 15 people famous for their contribution to the art of computer programming and asking the candidate to explain for as many as possible why they were famous would be a bigger improvement (provided 15 people genuinely famous for advancing the art were used, instead of this list - and of course that would get rid of the restriction to currently living people). But as a litmus test giving a black and white (OK, I got that wrong, should be red and blue) answer - no way; yes it could start off an interesting discussion; but I tend to agree with Steve - I don't remember the authors of all the good things I read, I don't even know who the authors of most of the tools I use are, and I don't think that makes me a worse programmer.