There's the nice clever intelligent solution which could be developed over a few weeks, or there's the fact that the phishers have decided -- for whatever reason -- to go apeshit today.
True, but in this case it seems like it's not a particularly new problem, just something that they've finally reacted to?
They actually mention sinkholing spreadsheets.google.com in this post from August 2011 [1], they actually say "There are also some forms which are more difficult to block ( I don’t think we’d be too popular if we sink-holed spreadsheets.google.com for example)".
There's the nice clever intelligent solution which could be developed over a few weeks, or there's the fact that the phishers have decided -- for whatever reason -- to go apeshit today.