No, not yet but was planning on Master System next using the Hexaeco Sega Wide core.I see that you made standalone emulators for Sega Master System and Game Gear, are there forwarders for these?
In the meantime, i have spoke to @SaulFabre and asked permission to use his recompiled RA PicoDrive core as a standalone emulator. After some extra editing, i think i have figured out how to use older vanilla RA cores as standalone emulators without conflicts. More testing is needed but plan on releasing Neo Geo, Neo CD, Amstrad, and Sega 32X. These are all superior to anything else we have on the Wii and i have already made forwarder channels for these but unfortunately overlays/bezels are not supported.
These should be ready later tonight if all goes well in testings.