Latest interest is Bluesy music, after listening to a (relatively) short gig at Chijmes on Sunday. In the exact words of a more knowledgeable friend:

"blues is a sub branch of jazz. it has a pridictable chord progression
jazz is about improvisation. true jaz is always different every time you play it
so norah jones, isnt really jazz, she uses jazz chords, but her music is fixed. so we lable her more as a vocalist.
blues later on was played faster and faster, and that is rock music. Which later gave birth to punk, alternative etc etc
jazz gave birth to blues gave birth to rock
jazz is miles davis, coletrane
blues is BB king, jimi hendrix, newer artists like kenny wayne
Rock/blues- Eric clapton in his old band cream and jimi hendrix and others in their era moved blues to rock, so you can hear strong blues influence in their rock music. and vice versa, strong rock influence in their blues. but they do play pure blues too
Rock: guns and roses etc etc
blues when you listen is the same old 4 chords at the back over and over again. It has a "melancholic" rather african-american folkish feel to it. it was what the slaves sang in the feilds as they work to express their pain: hence the term blues
jazz on the other hand has no fixed pattern in anyway whatsoever. true jazz, at least. So jazz is really instrumental music. It is complicated, out of control.
jazz was the new sound or rather the way of playing music that the blacks invented with the use of european instruments.
This sound was termed jazz.
and this sound in is pridictable form became blues (folk song)"

Will be looking to attend the UBlues Fest in July this year.