I too am having success with 1004. I do not use asterisk so I cannot comment on its working. So far I have working the core/hybrid, two PXE boot MDs, FLAC audio files, DVD rips, Photo Screensaver, Web Orbiter.
After having used Ubuntu Linux as a desktop operating system for every releases starting from 7.04, I am glad to be able to use LinuxMCE atop 10.04, as I believe it is far more stable than 8.10, not to mention the Long-Term-Support.