So, what effect did yesterday have? Over at TPM is a breakdown of sorts: SOPA/PIPA Blackout By the Numbers.
Here's some of what Carl Franzen has to say:
Now that the so-called “Blackout Day,” has come and gone, it is abundantly clear that the political winds in Washington have shifted in favor of the opposition. Numerous Republican former co-sponsors of PIPA have shifted sides, and far more lawmakers on both sides who hadn’t yet taken a stance have finally come out against the bills.
Perhaps more importantly, so, too, the SOPA and PIPA critics also seem to have achieved a decisive victory in greater public relations war.