On that note, I have a correction to my original post. I thought some of the historical data calls were working and some weren't. But I was mistaken about that. NONE of them are working -- the only things working for me are actually today's data.
That is, no GoogleFinance(symbol, attribute, date) calls are working. Without the date parameter, it works & retrieves today's data ok. With the date, it returns "N/A" & "error: Data temporarily unavailable."