I was browsing some sites yesterday and stumbled across a little tidbit of info on Jos Kwanten’s Page:

The next project that I will do is to port Bero’s XPCE NEC PC-Engine emulator. I’ve got a version working with Salamander, but It still lacks speed. I Hope to fix that problem (if possible) soon.

Interesting. It looks like we have another PC-Engine emu in the works for DC besides Hu-Go.