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Much of the attention on money in politics this election cycle has been focused on the new superPACs, and with good reason.

Recent court rulings allow superPACs — which officially are independent of specific candidates — to raise and spend unlimited money to support their favorite politician or cause.

Snarky comedians who mock people who share food photos on Facebook and Twitter (see this video) may be good for a chuckle, but they don't have the will of the people behind them.

That's what we've learned from our online survey this week, which asked: "Are your friends bombarding you with 'food porn'?"

Yesterday, in the San Francisco Chronicle, columnist Gwen Knapp hailed a tweet from an Oakland Athletics' player as the dawn of the "age of enlightenment."

In short, pitcher Brandon McCarthy sent out a tweet that suggested the "Kiss Cam" — a feature shown on scoreboards across the country in which a camera focuses on couples in hopes of a kiss — was anti-gay.

The House is set to vote Friday on a GOP proposal to keep some student loan interest rates at current levels. Many students have been concerned at news that the current 3.4 percent rate could double if Congress fails to extend the 2007 College Cost Reduction and Access Act. Host Michel Martin talks with Jason Delisle of the New America Foundation.

Mexican officials are probing allegations that Wal-Mart paid $24 million in bribes to speed construction of new stores there. Wal-Mart has also been accused of lobbying to amend U.S. anti-bribery laws. Host Michel Martin talks with reporter Ana Maria Salazar, who says even big companies have to grease the wheels in Mexico.

The term "string band" tends to conjure up images of rustic simplicity, but Punch Brothers' music is anything but simple. Challenging to play, it offers many subtle pleasures, from strange musical structures to opaque lyrics. (I wouldn't have known that "Movement and Location," from the band's new album Who's Feeling Young Now?, had anything to do with baseball if Chris Thile hadn't explained it to me himself.)

Howlin' Wolf's masters from the Chess label have just been released on a four-disc set titled Smokestack Lightning: The Complete Chess Masters 1931-1960.

Homeland Security Secretary Janet Napolitano pledged on Wednesday the investigation into Secret Service agents who allegedly hired prostitutes this month in Cartagena, Colombia, "will be complete and thorough and we will leave no stone unturned."