The famous map from the developer diaries and the new 1.8 main menu still lives! I have just begun the process of updating it with all of the new features of 1.8 and have it up and running fairly often. There are so many new features and it has been such a long time that I am considering just starting a new map, but as of right now Greytower is still available for exploration. While waiting for 1.8 I spent many months training with the Monks of Minecraftia in the winter regions of the mortal plane and honed my skills as a builder, so anything in the future will be even more grand that Greytower!
6 Villages (One of which is an underground dwarf city)
1 Wizard Academy
1 Gladiatorial Arena
1 Barbarian Encampment
Many secret areas and eastereggs
GT: Mr CurlEspatan