Just for fun, I read through NPR's list, "10 Artists You Should Have Known in 2012," and looked the selections up on Daytrotter.
Unsurprisingly, six of the ten selections have sessions on the site. Here they are for our communal delectation.
I visit this site and download sessions with great regularity. That said, the only one of these I'd heard this year was Polica. Just like that, the site is a whole new place to me. That's why I love Daytrotter.
Here's the NPR list: http://www.npr.org/blogs/bestmusic2012/2012/12/07/166745766/10-artists-you-should-have-known-in-2012