PCWorld: "On the negative side, Palm will not leverage the multimedia
capabilities of its recently purchased Be operating system, meaning
things such as MP3 will not be available. Perhaps most aggravating
to Palm users is that utilities written by third parties to expand the
capabilities of the current OS, called "hacks," will not be supported
in OS 5. For example, it is a hack utility that allows users to touch
the title bar and get a dropdown menu.
"We were told that every single hack will not work in the future,"
said a developer."