I don't mean to be rude but if you haven't heard of JoCo, at least in passing, then you might consider whether you belong on a site with the tagline "news for nerds".
Code monkey was a meme of sorts among programmers many years ago. I don't know a programmer who hasn't heard of it.
Portal was a huge hit among gamers and the theme song, Still Alive, was talked about in gaming blogs all over the place. I'm not a gamer and I still saw it often.
JoCo has been featured extensively on geek sites and several times on Slashdot because of his unique approach to monetizing his music.
Of course none of this means that you are obligated to have heard of him but it does undermine your first three paragraphs. As an anecdotal counterpoint: I for one was happy to see him interviewed and interested in his responses. You can't expect to be interested in every person they interview.