It's getting a big Halloween update including the highly anticipated biomes and a rather nasty dimension you can use for fast (and likely dangerous) travel.
So anyway, I'm doing a bit of brainstorming for what I'll build, starting from scratch. Since multiplayer survival's going to be getting some bug fixes, and I may be able to invite other players to my map, I'm thinking about some standard features as well as unique ones.
1. Forts with biome-themed megastructures. I'm going a bit OCD on hexagons and the number 6. The hexagon remains my favorite shape, and it's fun to think of ways to play with this sort of thing.
---Desert: Giant hourglass with obsidian caps, like I've repeatedly failed to build in Dwarf Fortress. Unlike DF, I can fill this one with sand and make it look like it's in the middle of falling. The center of the top chamber will have a mini-oasis. The bases will be hexagonal, and the rooms inside will be 36 meters (blocks) from opposite corners.
---Tundra or Taiga: Something involving a giant six-pointed snowflake, possibly made of ice. It may be tricky to find a way to light it without melting any of the ice.
---Ocean: Giant truncated tetrahedron (hexagonal face pointed up) floating in the air. I'm thinking of access by waterfall: Boats will float up waterfalls, and there'll be one in the down-pointing triangular face. The other three triangular faces may act as entry points for a minecart station on the top floor.
I'll probably spend a long time getting all the resources together for just the desert fort and hourglass, but if I do get to the point that I can get other players on my map, I may give some of you creative control over the megastructures and the nearby support forts. Just remember: Do something with hexagons and/or the number six.
2. Cabins: Distributed cabins, including one at the spawn point (assuming my priority desert site isn't right there.) They're meant to be waypoints in case night falls while traveling from one place to another, or if the sun sets sooner than I expected. They'll have some nice decorations, chests with basic supplies, and generally be a nice quiet place to spend the night. They'll also be connected to nearby mines and serve as a base for mine workers.
A. Cobblestone or brick chimney with a furnace (fireplace) inside for smelting.
B. Chests with basic equipment a lost/respawned player might need.
C. Cozy atmosphere (Decorations, windows with a good view)
3. Lighthouses: For navigation aid. Each will have an identifying rune made from lava behind glass. For easy memorization, make it look like a twist on a standard character.
4. For my desert fort, I was thinking of making it a big stone hexagon, maybe with glass extensions at the points. Inside, there'd be a ring of 12 hexagonal rooms with a large "lab" in the center for me to tinker with redstone, minecarts, and whatever else Notch might be adding. As for the purpose of the various rooms, well, I haven't decided on all of them. Some would be workshops for different materials, but others would be there to look good, like a library, swimming pool, dining room with makeshift table and chairs, sitting room in a glass point to watch the sunset, and so on. Floating above this fort, of course, would be the hourglass I described.