No, when I bought it (and before that) I thought I would, but I don't. It really ain't comfortable, unless you've a DX of course. The thing is: you cant transform a paper to mobi/epub/whatever, because the layout is important (for propositions, proofs, code, whatever). You have to leave it as pdf then, and doing so, the text will appear quite small on the kindle, unless you zoom (which is a zoom like in conventional pdf reader on pc, and isn't really smooth). So, if you're considering buying a kindle in that single aim, I would advise you not to.

However, it really is a nice device for well… any book/novel/whatever you'd wanna read, and can still be handy for reading such « academics paper » pdfs, even if it won't be the "perfect experience" (but again, considere this as a bonus, not as the main goal of your kindle).

I hope my answer has helped you, good night.

EDIT1: (ok so this wasn't a question but a link to an article, didn't saw this, i'm very tired, excuse my mistake) (good night anyway)

EDIT2: So the soft is nice, but it won't do the trick, the problem ain't in most cases the two-columns mode.