Nothing is impossible after you see this video.  A Nokia N900 got hacked and made to run Google's latest android os 2.2 also called the Froyo.

The video shows a demo of android 2.2 froyo running on the nokia n900. including a demo of the new lightning fast browser, avg of 3 seconds to load a fairly heavy page over wifi.

The project is not yet complete, but they did managed to finish these tasks.

N8x0 Port:

• ** Now Using Android 1.6 'Donut'
  
• ** Wifi works,
  
• ** Bluetooth Works
  
• ** Touchscreen works,
  
• ** Buttons work,
  
• ** Sound Via A2DP Bluetooth Works and seems stable
  
• ** first msdos vfat partition on the booting memory card work, other card slot does not work.
  
• ** Swap is autoenabled on boot using a seperate sd partition(Requires a different partitioning layout to original nitdroid hence my new post)
  
• ** Disabled androids new VOLD sdcard monitoring service and reverted to the older 'Mountd' as this can recognise cards with multiple partitions unlike vold
  
• ** SDCard is detected and mounted
  
• * Removed Google apps due to crashing and causing problems
  
• * Edited init.rc memory settings to allow more memory to be used.
  
• * Added E-Buddy Messenger
  
• * Added ASTRO File Manager
  
• * Added AndChat IRC Client
  
• * Added Connectbot ssh/telnet client
  
• * Added Snake Game
  
• * Added Twidget Lite Widget
  
• * Removed Voice Search/Dialer
  
• * Home screen now allows adding/moving/deleting items
  
• * Touch screen seems to be a bit inaccurate right at the bottom so try to keep off the very bottom edge - not too hard because buttons are fine size wise

source: talk maemo.org