Actually, Notch specifically said that after Beta, game-changing updates would come a lot slower, and he'd be more focused on content (ie. more blocks, items, mobs). So the general idea is this map reset might last us well into either gold release or at least till the next huge code update (like the way Halloween did).
I wanted to re-iterate two or three things I mentioned in the meeting:
* I do not want HC to become about level-grinding. If I wanted to level-grind, I'd go play games designed for it, like WoW, or any other RPG-based MMO. That's what those games are for. Minecraft is for building, collaboration, and occasionally kicking some monster ass. If the game has suddenly taken a shift towards having to spend most of my online time hacking away at the same 3 mobs just to be able to use a spell or a tool that I need in order to build, then the game just went from being a dream to becoming a tedious piece of crap. I understand that the levesl make it a little more interesting, it gives certain types of players a sense of accomplishment, and so forth, but I didn't buy this game and donate to the server just so that I could play a lower-resolution level-grinding RPG. I did it because I love the concept of being able to terraform and be a landscape and structural architect in the digital world, among a community of artists and architects who can appreciate each others' work without griefing it. If I wanted to do pointless grinding just so I could use the next weapon on the list, I'd play Runescape or something.
* In a similar vein, I don't want to be forced to PVP or mish. I may decide at some point I want to partake of it for brief stretches at a time, because it's fun, but as you all know, I've got a very demanding wife and 2 kids. If I had time to run mishes, I'd be playing EVE Online (which kicks ass, if you have uninterrupted hours at a time to play mishes). If I wanted to PVP all the time, I'd be playing Astro-Empires (which is ALL about PVP by numbers).
* New map should have a general rule of something like "Block Levels 1-18 will get periodically wiped and regenerated." This will alleviate the problems with over-mining, while allowing some underground cities to exist. Just don't build anything you want to keep at block 18 or lower, and you'll be fine.
* Will fire be enabled on the new map, and should it be? If we suddenly get access to Hell's blocks, bloodstone might make a nice addition to the main world.
* As was mentioned in another post, perhaps the old world can be made a part of the multi-verse or something, though that does cause a bit of a problem with the resources being carried over to the new game, so maybe not.
[EDIT] One additional thing I forgot to add:
* I do not want to lose "ALL" teleport options. Keep the Black Gates, scrap Teleports and Waypoints, or keep the TPs and WPs and scrap the Black Gates.... limit them to certain select areas, like just outside of cities, or something, but for the love of G-d, do not gimp cities more than a few paces from spawn by removing ALL TPs and inisisting on minecart usage. Tracks cost 6 bars PER TILE for those who don't realize this, and while iron WAS cheap on the old map, if we have limited resources, the prospect of just breaking 100 iron will be rather impressive, much less the 600 iron required to even create a modest 100 minecart track.
And as for the "just walk there," how many of you really want to have to stop everything you're doing and devote the next half hour to two hours, every time someone wants to see your town? Because that's exactly what you'll have to do if you want any new visitors. You will have to stop everything you're doing, meet them at spawn, wait till day, and try and book it to your city in time, possibly holing up with them for the night if it gets too dark and too real. And then, right about the time you are halfway there, someone else wants an escort.
To hell with that. I'm all for limiting the use of TP-like effects, but at least give established areas the opportunity to still have ONE leading to their site.