I'm considering doing what Lutherian projected, though I'm a strongly-invested EN user of many years. There's no way I'm paying for two Premium accounts just because EN doesn't let me sync only work-related folders to my work laptop. (And my company won't spring for EN Business, so this is out-of-pocket for me.)
Just before I began this reply, I had downloaded Evernote onto my new work laptop, and was about to install and thought, "Nope. Do I really want gigs of unencrypted personal files on my corporate IT backup server?" It's not just a personal risk -- it's a huge waste of resources.
I've supported EN through many iterations and side projects, many of which I beta-tested, offered free UX advice (sometimes on these discussion boards), and enjoyed. But for some reason this feature, which other cloud services managed to implement, this one isn't ever on EN's radar.
Pleeeeeaaassse, Evernote, pleeeeeeasssse....