Google Transit

http://www.google.com/intl/en/landing/transit/#mdy

A pretty good how to on using Google Transit.

http://www.youtube.com/watch?v=-A2RMz3KTxM

Unrelated to google transit but a glimpse into the future that I thought you might find interesting as well.
Check out the website below, everyone gets real-time information via the web in Switzerland.

http://www.swisstrains.ch/