I have an HTPC with all my music. I have a laptop and I rip a CD to the laptop's library. I add it to the iCloud. How do I have the HTPC automatically download the new songs (since they weren't purchased through iTunes)?
Using Home Sharing iTunes can automatically sync libraries. iCloud isn't necessary.
http://www.apple.com/support/homesharing/
iTunes Match is the only way to sync up music that is not purchased from iTunes to multiple computers. I signed up last week. It is still sort of buggy, but overall the value of having all my music available on all my devices is worth living with the bugs until Apple fixes them.
Using Home Sharing iTunes can automatically sync libraries. iCloud isn't necessary.
http://www.apple.com/support/homesharing/