Android Installer for Nokia N810 Internet Tablet
http://www.pocketables.net/2008/07/android-install.html
quite easy just to try...
ARM-USB-OCD
This is quite cool. With this, you can play with your gadgets quite simply and easily;) Also most importantly not so expensive.
http://www.olimex.com/dev/index.html
....and Finnish distributor;)
http://www.atomia.net/tuotteet.php?begin=1100&level=2&code=ARM-USB-OCD