Adafruit now even has a tutorial to connect the DHT22 to the pi. The example code works on most pisPis, I had to tweak the cC
code a little like posted in the raspberry.orgraspberrypi.org forums (increase a sleep timer).
For other working sensors (including 1-wire and I²C) take a look at my blog. But e.g. the TMP102 is still missing in the list.