I've seen a number of RP's like that around the site. In my Rp 'A New Professor In Town' for example, I don't play a role in the RP itself outside of a few select NPC's who help move the plot along. The 'play your own character' RP seems to have taken over a bit recently, but there are still a few RP's I've seen with what you term 'traditional' GM's.
Actually, that would be looking at it the wrong way around. Play-your-own-character RPs without the tabletop elements are the ones that have traditionally been the norm here on PC; it's the puppet master GMing that's the new kid on the block.
Eh, I will not lie, I'm still not fond of the concept. It's like importing all the inconvenience of DnD into a setting that doesn't fit its pacing to begin with.
That aside, there is absolutely nothing preventing people from running one-on-one or invitational RPs; all you need to do is state as much and fulfill the usual criteria required of any RP here. That being said, however, they are a clear minority so they don't warrant their own subsection. It's hard enough just to keep both PRP and ORP alive. If you want something more exclusive, my suggestion is starting a social group and playing it out over IM.
As for the resource situation...well, for the record Mika's guide was actually submitted, approved and posted. In an effort to cut down on stickies, as has been policy here, I just ruled to have all guides posted in a single sticky (namely,
this one); you can go right ahead and read. Seems it just got left in the subsection when PRP and ORP merged, though, so I can see why you would miss it.
And yes, it's shameful it ended up the way it did (so much for initiatives...huu...). Myself, I realized I couldn't write a new guide to completion before I had figured out more things about RPing, go figure. XD
Might get back to it one of these days, but I won't hazard promising a deadline yet. And yes, I very much support the notion of people contributing guides for the section, including collaborative efforts. People just seem...rather reluctant to do that, really.