The Nonpareil bugs I introduced last night were easy to find by comparing traces captured with the last stable version against traces captured with the latest code. Fixes are checked into Subversion. I've started integrating Phineas chip support (real-time clock chip used in HP-41C Time Module and in HP-41CX), loosely based on the work of Thomas Olesen and Chris Roccati.
Howard Owen has a slightly earlier release of Nonpareil running on pdaXrom on a Sharp Zaurus C860. He found some trouble loading mod files with the latest code out of Subversion, so I added some debug output for him to try. He has expressed interest in porting to other Zaurus platforms, which use the Qt widget library. I have a Zaurus SL5500 and would love to run Nonpareil on it, but I don't like C++ programming so I'm not motivated to write a Qt-based front end.