I wasn't exactly importing the calendar straight from Google Calendar (I can't figure out how. Do you just save the .ics web address they give you?). But I have it set to be received read only to Windows Calendar for Vista. And from there I had Windows Calendar export an .ics file which I then tried to use on the tablet.

I'll see if I can just save an .ics calendar using the private .ics address Google Calendar gives me and importing that into calendar.