So I have the promised minimalist version of "gDrive". To get the good stuff though I'll have to upgrade our family domain and/or my personal Gmail account. That's not necessarily cheap at current prices.
You can't actually upload any file. Executables, including OS X apps. can't be uploaded.
Update 1/20/10: I found my first bug. I uploaded a PDF and viewed it. From the viewer I obtained the share link. The public link didn't work however. When I clicked "preview" it reported "Sorry, the page (or document) you have requested is not available."