Well Google finally got around to integrating their calendar service into the main Gmail interface as I was hoping for in a previous post. It is pretty sweet too. Gmail can automatically enter items into your calendar when a date is found within the body of an email if you so chose. In addition to this when sending an email that contains a date you have the option of entering it on your calendar which effectively makes the email an invitation, and as such when the recipient accepts that invitation Gmail and GCal can automatically keep track of attendees. This is pretty neat, however I am pretty sure that both people involved need to have Gmail in order for this feature to work, but still it is pretty neat.