I only attended one night (Friday) of this festival, but it was very enjoyable. And if it continues, very promising for the future. It took place in the Roscoe Village neighborhood north of downtown Chicago. Pretty accessible by public transportation, too. You can see the lineup in the link above. Much smaller at this stage than Big Ears: evening shows only, small venues, very walkable between venues, and MUCH cheaper (a single night pass was about $100). The crowds were pretty enthusiastic, too.
At the Beat Kitchen (a small rock club):
1) Chicago Underground Duo w/Rob Mazurek, Chad Taylor. A high powered set with Taylor's relentless tribal beats supporting various outbursts on trumpet, electronics and wordless vocals by Mazurek.
2) Jeff Parker Expansion Trio w/Ben Lumsdaine (drums) and Jeremiah Chiu (electronics). Another high energy set with some explosive excursions among the trio, but Parker was definitely in charge of this show. I've never seen him as a leader before - very impressive.
At Constellation (a larger performance space a few blocks away):
3) Mary Halvorson: Amaryllis Sextet (Patricia Brennan, Nick Dunston, Tomas Fujiwara, Adam O'Farrill, Jacob Garchik, trombone). A typical Halvorson show - interesting and well rehearsed compositions, with professional performances by everyone involved. I've seen this group at least once, and Mary countless times. She somehow seems to be everywhere, all the time. I've seen her more than any other musician in the past several years - either with her own groups or in other collaborations.
So, something to keep an eye out for next year. Always a pleasure to hang out in Chicago, anyway.