Which brought up the idea of writing a mod in order to include everything I'd need to honest-to-dog build Akelara properly (like a rainbow block, for the rainbow sands, and other things that escape me at the current time) and building the OMGWTF version of Akelara on a private server (with creative mode this time! No way in fury am I trying to steal enough lava from the nether for THAT sized building!) then opening it up to others and letting people explore in adventure mode - maybe even doing some active storytelling or sommat - have a running storyline that people can pick through at their leisure. Maybe build Koshi Keidai and leave it mostly unlit, so that all sortsa junk spawns in the tunnels, and leave troves of treasure and story deep in its caves.
Would people be interested? I'm already capable of the server version of the game -- my husband is currently running a hardcore game on our server, and Birdie's played on the normal version of that game (before it was taken down), so I know people from distant lands can join...
Oh! And current screencap of Akelara's progress:

It has waaaaallls... and scumbag skeles, but they'll burn in the sun!