I ran some tests on this and found that I could create a map in Project to
line up the columns with Google Calendar. I used the following as a test:
Project Field Google Field Data Type
Name Subject Text
Start Start Date Text
Finish End Date Text
This almost works. For some reason the date fields in Project are not
recognized as Date types, so are saved as text. When you look at them in
Excel, they appear as Sun 7/19/09. Google will not read these, and you can't
simply reformat them in Excel. Retyping them in the correct format (which is
completely pointless) will fix the problem, and they will import
successfully into Google Calendar.
I'll keep playing with this and will let you know if I find a solution. I
suspect that this will need to be customized in VBA or something.