MetaView, the developer who also ported XPDF to Palm OS, took the code of the unfinished PalmDOSBox and continued developing it. The new version which is availible in his blog also supports the keyboard of Palm Treo smartphones and has an on-screen keyboard for devices without keyboard.
Unfortunately, the new version doesn’t work on my Tungsten C yet. It crahes after starting the emulation mode. This could be a problem because the newer smartphones and PDAs have a new operating system (Palm OS 5.4) and a new memory management, but it could also be a general incompatibility. As soon as it works, I will try to run some applications and games on it.
Please write a comment if it works (or not) on your machine.