Well, it starts to look like a pattern, bitcoin starts to raise in June and drops dead in September. Wonder what causes this... summer holidays?
For those believing in miracles and claiming to not see the "J" shape of a bubble, just look at 1 year chart... you'll see it there, just by late July. [http://bitcoincharts.com/charts/mtgoxUSD#rg360ztgSzm1g10zm2g25zv]
Good news however, this time the bubble didn't went postal, just up to 13, maybe still go up to 15, so its drop will be "soften", perhaps to 4~5 USD for a while to recover to 7~8.
So yeah, bottom line: it's a great time to sell and welcome the new batch of bitcoiners. Let's see about next year, if it goes as before, they will become disappointed about bitcoin (making a hell of good time to buy) by October, learn how to use it by Jan-Feb 13 (if the World doesn't end in 2012 that is) and by Feb-Jun'13 we can expect a smooth bitcoin behavior before the summer peak again.
Just my 2 cents...