Google-calendar – Default to ‘More Options’ in Google Calendar

There's an article on this here. I've not checked that it works, but it seems pretty straight forward. The essence is that instead of importing the calendar, you add the URL of your event feed as a public calendar - here's a summary of the steps:

1. In Facebook click on "Events"
2. Click on "Export Events" and copy the URL
3. In Google Calendar go to "Add" under "Other calendars" and choose "Add by URL"
4. Paste the URL you copied from Facebook and click "Add"

[Update: to make answer more complete]
If you run into issues with private events not showing properly then check out eventbusyfix.info. This site acts as an inbetween to clear the private flag and enable Gmail to show them properly (Thanks to prestomation for this tip)
[/Update]

Hope that helps!

Now you can set when you will be notified for All-day events in the Google Calendar Settings.

1. Go to calendar.google.com in your browser
2. Click on the gear icon in the upper right and choose Settings
3. Choose Calendars from the top menu
4. Select 'Edit notifications' for the calendar you wish to edit this setting for. The first calendar listed will be your primary calendar, and usually the one you'll want to work with
5. The second setting All-day event notifications allows you to how many days before and at what time you wish to receive the notification
6. Be sure to click Save before leaving this page