The majority opinion, which was delivered by Justice Kennedy...Kennedy wrote: "If the First Amendment has any force, it prohibits Congress from fining or jailing citizens, or associations of citizens, for simply engaging in political speech." He also noted that since there was no way to distinguish between media and other corporations, these restrictions would allow Congress to suppress political speech in newspapers, books, television and blogs.
The group, Move To Amend, a "project" of something called the Campaign to Legalize Democracy (I'm against them just based on their name!) says:
We, the People of the United States of America, reject the U.S. Supreme Court's ruling in Citizens United, and move to amend our Constitution to:
* Firmly establish that money is not speech, and that human beings, not corporations, are persons entitled to constitutional rights.
* Guarantee the right to vote and to participate, and to have our votes and participation count.
* Protect local communities, their economies, and democracies against illegitimate "preemption" actions by global, national, and state governments.
Well, maybe that last one, depending on interpretation, has some merit.
As for money not being speech, here's what the great Glenn Greenwald has to say:
Anyone who believes that would have to say that there’s no First Amendment problem with any law that restricts the spending of money for political purposes, such as:
“It shall be illegal for anyone to spend money to criticize laws enacted by the Congress; all citizens shall still be free to express their views on such laws, provided no money is spent;” or
“It shall be illegal for anyone to spend money advocating Constitutional rights for accused terrorists; all citizens shall still be free to express their views on such matters, provided no money is spent”; or
“It shall be illegal for anyone to spend money promoting a candidate not registered with either the Democratic or Republican Party; all citizens shall still be free to advocate for such candidates, provided no money is spent.”-source
And here's Greenwald on what the Supreme Court got right.