Mark at marks-space.com shows how to automatically log into a Raspberry Pi:
Below I will outline how to automatically log into your Raspberry Pi from a Windows PC using Putty. This requires the setup of SSH keys, which is very easy to do.
Each Friday is PiDay here at Adafruit, be sure to check out our posts, tutorials and new Raspberry Pi related products. Have you tried the new “Adafruit Raspberry Pi Educational Linux Distro”? It’s our tweaked distribution for teaching electronics using the Raspberry Pi. But wait, there’s more! Try our new Raspberry Pi WebIDE! The easiest way to learn programming on a Raspberry Pi.
We now have Raspberry Pi Model B with 512MB RAM in stock and shipping now!