Damn, you guys are so fast... Hard to keep up with only a dialup connection!
I've downloaded the new memory applet and will try it ASAP. FWIW the original one worked like a charm, I did setup a 64Mb swapfile on the SD card allright.
A few notes about what I've found so far:
MusicPlayer 2.0:The display in play view is a bit "corrupted": every text displayed is not properly erased when modified, and some of it doesn't display at the proper place right from the starts (horizontally). So it's impossible to read the tune's title, or the next tunes coming... all the digits (which I suppose are bitmaps) display fine, though. There's also a bit of the "Off" button bitmap scattered on the bottom left part of the display. All in all the display looks a bit messy, but otherwise the application works as expected, from what I could tell.
Movie Player 1.11:At first, I thought that the MPEG-1 movies that played fine on the Sharp stock ROM (v1.01) did not play anymore. I was getting a rather obscure "

" error message (Japanese text, for sure, but displayed with a non-Japanese font) when trying to play the file. Then I realized that I was already playing a MP3 tune with MusicPlayer at that moment, which obviously is the cause of the error message. Stopping the MP3 lets Movie Player do its job normally, but in the end it would be nice to locate and translate that short & cryptic error message! (Don't remember triggering it with the Sharp ROM so I don't know what it looked like before)
KeyHelper:
The sticky shift key is IMHO causing more trouble than help, as already mentioned... I do realize that there is a learning curve involved, but I've disabled it for now. In fact I reinstalled my previous keyhelper.xml config file and everything is as I like it (accented characters & such).
USB auto-mount:Works great. I've just purchased the required adaptor, and when I inserted it (alone) in the USB port of the zaurus, it was recognized by the system (at least, the Zaurus detected that something had been connected, thanks to the two grounded pins of the USB-host adapter).Then I inserted a USB memory key, and sure enough it showed up in the Launcher's file explorer. The icon's name is "Storage /dev/sda1" and since the filesystem on it was FAT I was able to browse its content. Using the applet in the bottom bar, I was able to "eject" it (i.e. it didn't show anymore in the file browser screen, and there was one less entry in the mtab file), but this didn't turn off the green light on the key, the way it usually happens when I umount it from my windows PC. Unplugging the key seems to work fine, though, I didn't get any crash or dramatic error message with dmesg.
Let me know what kind of test I must do with USB, if needed, or what potential problems to look for...