n900 has pixelpipe plugin for picture/video uploads which supports myspace.

http://blog.pixelpipe.com/2009/10/17...ith-pixelpipe/

I guess the other tool to use myspace with is the browser. With flash support you can use the myspace music player and all the tacky bells and whistles flashing typically on myspace pages.

I have no idea if better support is on the way.