Hello Andrew,
Glad I could help. I have recently seen Method users who need to reauthorize the OpenId Calendar sync. I can make a note for others who do find this post and are having similar issues. Try these:
1. Make sure Enable syncing with Google Calendar is checked in your Google Calendar menu.
2. Sign in using your OpenID. This means clicking the Google Apps button on the login screen. This will reauthorize the OpenID to link the Google account with your Method user account.
3. If you have the Gmail Gadget going, sign in through Method on the Gmail side. There is a Method link in the Apps menu. The apps menu is the nine squares square icon on the top right. (I don't know what its name is)
If you still can't get the Calendar sync to go, please give us a call on the Method support line.
To let people know, I refered to the update to the Gmail Gadget to OAuth 2.0 which was sent out in an email to customers in mid-Sept.
Greg
Greg