Sadly No... But there is a yogcast mod that allows you to teleport to the moon...
Notch did mention adding space in a future update though...
Chat with our AI personalities
You press the space button!
You double tap space to begin flying. After that you can press space to go up, and shift to go down. Double tap it again to get out of fly mode.
There is no heaven in minecraft.
First you start Minecraft, then you go on "multiplayer" and type in an ip !
Have a look at Minecraft Forums it should tell you, or you can go to Minecraft.net or Minecraft Wiki.