Very nice...
...but to tell you the truth, this isn't jazz at all. Rather something like oldschool hiphop, although i'm not an expert on hiphop so i wouldn't know but i do know jazz, and this isn't jazz ;)
Don't worry about it though, it dosn't change that this track kicks a-...um...butt.
The groove is kicking very nicely through, and the laid back attitude of the whole track is very nice overall. Also the fact that you've made the track "loop-able" is a very cool gimmick for the flash users.
One thing i'd like to point out though, is the general quality of the audio. Sounds to me like you've compressed this track way too far, or you need some serious mixing on the track. It lacks a whole lot of top, and the bass seems muddy and irritates me. When compressing to mp3, make sure you make it a proper quality to begin with, flash users can compress it further via flash later if they need to. I'd reccomend as high quality as the Newgrounds 4 mb limit allows, that means anywhere between 128 kb/s and 192 kb/s depending on the length of the track, i can't say.
And that's all i had to say about that.
Kickass scratching, keep it up dude!
Kind Regards,
T7
Ps. If you'd like to do me a favor you could check out my stuff too :)