A little late to the game on this one, but Q2 and NPR released a crowd-sourced 100 Composers Under 40 list way back in April.
Generally I don't buy into Lists, but I do think it's interesting to see what "the people" have come up with as representative of today's musical culture (ahem ahem: a lot of music that might fit in the much-disputed indie-classical genre). I'm a musicologist and I actively search for music by young composers - and even so, I've only heard works by 37 of the finalists. New music: not dead yet!
How did you do?