I donīt know... Youtube is the answer for your question.
Other way is to access
GarageBand.com : GarageBand.com. It was retired on July 15th, 2010, but there you can find directions to make your music available for streaming or download for free. Here in Brazil I am a member of a similar free site. Where i store every thing produced by a jazz band that i (papi) have with my daughter and my guitar teacher (tioArthur). A picture of the band you can see at Discografia/Outros Albuns in the album called Bruto accessing
JuliaPapiTioArthur - Bandas de Garagem. If we have an idea we play and store there, even it is just a little piece. To give you an idea: The song A bailarina (see at Videos) although not a jazz piece was made just joining parts. I made the base guitar and my daugther the vocal in my house using a pc then we send to my teacher (by email) that put the solo guitar and the effects. Then my daughter made a cartoon video which was joined with the song using a mac and then it was publish on youtube. We are moving all the pieces to youtube because presently is the best way... If you decide for a youtube video donīt forget include in the video how other people could play in the same way you did.