ShackledNation
Libertarian
The media is predisposed to support a movement like Occupy Wallstreet, so I don't find that argument very persuasive.I voted for Occupy on the grounds that prior to its emergence Wall Street was unopposed. The fact that an opposition has arisen where there was none means that the opposition is winning, although there are many battles yet to fight.
As usual, my friends on the right have no clue what the movement is about or even where the battlefield lies, and so are evaluating it based on false criteria (e.g. how the stock market is doing). The target has always been, not Wall Street itself, but the corrupt influence of Wall Street over the government, so forget the stock prices and try to evaluate that. It's still in existence, of course, but the fact that the subject is being addressed in politics now and that liberalism in the Democratic Party is starting to show feeble signs of life counts as a victory.
As for the effect on the dialog, let's see what comes up in a Google search for "income inequality":
Debating the future of the middle class - latimes.com
Income inequality: The not-quite-winning issue | StarTribune.com
AFP: Obama challenges rivals on US income inequality
Obama and income inequality | The Salt Lake Tribune
And for "campaign finance" or "campaign finance reform":
http://www.nytimes.com/2011/12/31/us/politics/restore-our-future-attack-ads-harm-gingrich-in-iowa.html
City's 'Pay to Play' Campaign Law Survives Lawsuit - NYTimes.com
Best Of: Occupy Wall Street group protests at campaign finance HQ | Florida Independent
http://www.nytimes.com/2011/12/15/books/republic-lost-campaign-finance-reform-book-review.html
Ill. task force offers public financing options - BusinessWeek
So there you go. As usual, Occupy can quote Mark Twain regarding exaggeration of the reports of its demise.
Your premise that nobody has challenged wallstreet is also incorrect. Libertarians have been criticizing the government wallstreet collusion for decades. The tea party also criticized the bailouts given to wallstreet and the banks.