Blogs are not too good of a source for this, the more mainstream the source is, the better! What do daily newspapers, etc say? They were all very bullish just a short time ago.
+100
My impression is also that mainstream has been bullish for a couple of years with more alternative sources also calling a top for years (with a lot of people getting burned by that I assume)... when mainstream is fully bearish that is when you stop shorting/go long
But perhaps more interesting than if markets go up or down is that, with fear back and all the QE BS a bit depleted, now economic news seem to matter again. Next interesting global data point: US factory orders at 10 EST.