Most any remote that operates with the same frequencies can be made to work with the empeg through Mark Lords excellent HiJack replacement kernel, which enables you to do IR remote code remapping. To check if a remote will work, there's also a page which displays the codes the empeg receives - just go there aim the remote at the empeg and see if codes show up. If they do, you just add entries in a file to map [new remotes code] -> [Rio remote code].

Other goodies HiJack gives you is, among many more, ftp and http access to the player (if connected with Ethernet)

/Michael