President Obama addressed it in his Oct 6 news conference.

He doesn't sound all that enthusiastic to me. More like (paraphrasing) "Yeah, they're upset about a whole bunch of of things related to the economy and government. Now, MY tax plan... My jobs plan... MY etc., ...and we need a strong business sector."

The protesters are focused on economy in a very broad-based way, Obama's focused on what HE can do about it (presumably, without pissing off too many rich people).