I've been looking around for some music playing software for the Acer. My main requirements were that it should play OGG, be simple to use and preferably free (as in beer at least). One thing I've found with the Acer is that it is very LOUD! No need for volume boosting technology as on the Palm. Windows Media is pretty useless so ruled itself out.
First up was MortPlayer. This has lots of nice features, including some good skins with big buttons, but I had some problems with the power saving. Once the screen turned off I had problems getting it back on. Whilst using it I suffered a crash that required a hard reset. Since then I have lost the ability to see the battery level. It just shows 0%. This may be unrelated to the application. It could be a hardware fault, but the battery still works.
Next was TCPMP. This is mainly a video player for those who want to watch films and TV on a tiny screen. For audio it's pretty limited. It doesn't even display the playlist whilst playing.
Finally we come to GSPlayer. It's fairly similar to Mort, but I have yet to find a nice skin. However, it works very well and was extensively tested on our recent train journey. This will do for now.
Like the Palm the Acer may be limited to 1GB SD cards. This is a shame as the bigger ones are getting cheaper.
For playlists I am using a little Python script I wrote. It scans my music folders for those without a playlist an creates one. This meets my requirements as I mainly listen to albums. I intend to publish it on the site eventually.