I had done some fun Ras Pi Blog posts in the past, here are a few highlights:

 

 

Ultra Sonic Distance Sensor

Ping))) Me!!!

 

 

Photo Sensor

Reading a photo sensor with the Raspberry Pi B+

 

 

Passive Infrared sensor

PIR-fect

 

X Windows on the Raspberry Pi

Taking Advantage of X Windows on Raspberry Pi

 

Enjoy!

 

Mike