WERS 88.9 FM Emerson College Radio in Boston, at www.wers.org
I first heard this station when I was in Boston (out for a run in my home town of Marblehead). I recently found them on the Web. The weekday show Jazz Oasis is 10 AM to 2 PM EST, which is 7 AM to 11 AM PST, which is perfect for early morning listening (unless I am listening to John in the Morning on www.kexp.org). As the name suggests it is a jazz show and a good one. The show after that, Gyroscope, is "an eclectic mix of rhythms and melodies from around the world".
They don't have archives or a real-time playlist. But they are worth checking out.