It might seem uncharitable to start like this, but I never had high hopes for the Palm version of RealPlayer. Its big brother on Windows has long been a bloated mess of proprietary formats and prosaic protocols. The PalmOne edition seems to be very similar, but for the fact that it is missing many of the features of the Windows client.
Lacking in any capability to play video or streaming audio, RealPlayer for PalmOne is really nothing more than a simple MP3 player with support for RealAudio formats. Its user interface is simple enough, but fairly unattractive.
The only thing this program really has going for it is that it's free.