I like the bridge design. Thanks for extending it to my mountain.
I'm starting to make a nether hub with rail system. My lair mountain stronghold has the first nether portal, and I'll do town, my mine and anywhere else people want. If you make a nether portal that you want hooked into a rail system, post the coordinates of it in the nether and I'll add it to the list below so someone can work on connecting it. Hopefully eventually we'll have a great portal rail system to make travel easy.
Unfortunately my idea of a rail network using nether portals was misguided. You can ride minecarts through MultiVerse portals (which are created by clicking a rectangle of blocks and typing commands, rather than making a portal outline in Obsidian and lighting it on fire), but not through Nether Portals. Oh well, at least the Nether can be used as a regular walking transit hub.
At some point if the world gets really big I might investigate the MultiVerse portals further, but regional rail on the main world side should do for now. rail lines.
Well, the way we could do it is have people walk away from spawn more than 1024 blocks, find some landscape they like, claim it, make a nether portal and connect it back to the nether hub. Then you can make a rail system to connect the portals too.
After I build a few more buildings at spawn and supervise the building of some others, so they're up to the same quality standards I expect of myself, I'm off to find a good plot. I have a wicked design in mind for my main residence.