Re: Crossovers: Unfortunately no. :< I sort of have this idea of the kids from HP working out what exactly was going on between Merlin and Arthur (and Ginny and Hermione getting inordinately excited about it while Harry and Ron are all "...o-kaaaay" in a typical teenage boy fashion) -- as part of a school project or whatever -- and then, at some point, have research talk back at them in Merlin's (and maybe Arthur's) voice(s), Marauders' Map-style.

Either way, it hasn't been written. Or at least I haven't been able to find it yet. I'll keep my eyes open and you in mind, though!

Thanks for the heads-up on the author -- falling_voices it is! :D And they seem extremely surprised at their instant internet fame. Which I find strangely endearing. I'm sort of tempted to add them myself, but I figure it'd be sort of creepy, seen as I haven't interacted with them at all so far. *laughs*