In the Dreamforce app, you click on "My Calendar", then "Email My Calendar." Then forward the email you receive to firstname.lastname@example.org. You'll receive back an email with an attachment that you can import and add to your calendar.
This is a great way to provide an integration that works for those of us that no longer use Outlook. (Yay for Google Apps!)
Also, I love that I'm now able to see all of my sessions and I can add my own meetings (like with my boss or evening events), which isn't possible with the Dreamforce app Calendar (yet - although I have suggested it. Maybe next year).
Thanks for sharing a neat solution guys!
Now my calendar looks like this:
Note: it appears that their website is currently down for maintenance, so I viewed a cached copy of the original link by going to Google, searching for the url and then clicking on 'cached.'