Bukkit

-Added new map types: "height" and "biomes"
-Altered behavior of all map types: maps now only redraw the area nearby the player, mimicing vanilla minecraft maps. This solves a number of performance and inaccuracy problems, especially on the ores map. (Previously, the ores map would happily attempt to draw chunks that were not loaded, which was causing those chunks to be *generated fresh* on some servers. Whoops. That doesn't happen anymore. ^_^)
-The slime map no longer follows the player, but now draws like a regular map.
-All maps keep an internal buffer, so the entire map is no longer redrawn every frame. This will facilitate map saving (and reload persistance) in the future, but it's not implemented yet.
-Height map for ores corrected, also that height map is dithered for improved visuals. This will affect ore display slightly, as ores are now viewed from the top instead of the bottom. Ex: iron and coal will now correctly occlude diamonds in a great many cases.

Note that on my test machine (a CR-48) scale 0 maps were having the most difficulty keeping up, because they have the most pixels to draw during any given render step. Note also that getting minecraft to do anything at all on a CR-48 is intense torture that is not highly recommended. Ahh, holidays. On the plus, most of the performance bottlenecks were easily discovered this way, and the plugin should be much more stable on busy servers.

The height map is supposed to detect water and draw it blue, but that's not working. Also, I'm not certain if Savanna or Shrubland biome types are even in use, and I could probably do better coloration on the ice-type biomes. Do test and let me know if the colors don't make sense. Also: note that you should now be able to sort of detect invalid slime chunks-- any slime chunks that are also mushroom biome chunks will not spawn slimes. This needs to be improved still.