BigTable seems overhyped to me. When you read the details on the very scarce reported facts (remember, there's no source anywhere to be seen) things either don't add up or don't look that revolutionary. For example their super-secret compression technologies (Zippy in particular.) Also Jeff Dean's talk last year seems to completely miss work on integer compression in the previous 4 years.

Claims on slides and videos don't cut it for me anymore (I used to be borderline fanboy of Google's tech reports, like so many others.) Stonebraker has a great paper analyzing Google's claims with respect to databases (and it doesn't look so revolutionary.) That's why I'd be surprised if Oracle buys Google's hype just like that.