Caporegime
How can it be infinite? Is that just the single player map?
I used to play a multiplayer map where i was whitelisted (its on this forum) and it was a set size. It was huge but it was a set size
Linktart was the name of it
http://zoom.it/2hlc
You can still see my 'house' Just outside I made a lava fountain so I could find it on the map at night
I don't know if it has changed now, but previously when you started a single player game in Minecraft it would generate the World around you. According to the creators of the game that world would generate as you walked and would generate basically up until you ran out of hard disk space.