I'm throwing this one on the site just because it worked for me and it took forever to figure this out.
In Outlook 2007 you can now import "Internet Calendars" like Google calendar. However, when I did it the way described by Microsoft:
File -> Data File Management -> Internet Calendars
It would just sit in <pending> status forever. Oddly, doing it in the following way works, though to be honest I don't know why it's different:
Tools -> Account Settings -> Internet Calendars
Now all you need to do is login to your Google calendar account and get your private ICS URL and paste it in and you should be in business.