It doesn't work on my N900 yet... apachelogger, mpoirier and others from #kubuntu-mobile (who have done much more than me, I've just made some automatization ) know about it. And AFAIN there was no updates yet. So let's wait or try to compile your own kernel from http://git.linaro.org/gitweb?p=peopl....git;a=summary. In my case it did boot, but there was almost no modules in it.