Emulation Status: There are several emulators available and most games with high compatibility. Oswan and WSCamp were the recommended emulators according to the article. Emulation of Wonderswan on Different Platforms.
The PSP port is noteworthy for being the fastest N64 emulator ever on the platform, achieving close to or even full speed in many titles. Old feature covering early WonderSwan emulation.
DaedalusX64 is a Nintendo 64 emulator for Linux and PSP, with plans to port to Windows, Mac, PS Vita among other platforms.