i can't speak for rlyeh but after watching his various "projects" in the recent past and the notes made of him, it looks like he bounces back and forth between one big one and another. And then rather than release a not-quite there version, he'll shuffle it aside and plunge wholeheartedly into whatever he fancies next.
Sure this sucks because there's been lots of hype about his recent projects, they've been rather high-profile (fNes, Mame Port, Generator port, Genesis Plus port..!) and we all keep getting scads of information and maybe a teaser screen shot/video here and there. But apparently the guy's modus operandi is to do a bunch of work on various projects, then release them all at once when he feels they're ready. Anyway, it sucks 'cause we want it NOW but it doesn't suck 'cause at least someone's doing some work for all us emu-hungry folks..
the best we can do is be supportive, and patient. It's surely no problem every now and then when someone friendly pipes up "what's up with such n such emulator that was getting all this hype last week?" but if lots of people get in a frenzy about it, it's going to do nothing but piss everyone off anyway. So-- hopefully, time will pass and shortly he'll be done! This guy seems capable of quality work from his track record so far, I'm sure we'll all get to enjoy the fruits of his generous labor in due time! In the meantime, enjoy the work of the other authors.. and be thankful that the GP32 scene has picked up the (relatively) enormous amount of steam that it has, it's so much farther along than it's ever been (in such a short amount of time)
..blah blah blah.