Caused by SEC investigations, Goldman Sachs has limited its Facebook IPO offer to only foreign clients. SEC is investigating if reporting the IPO to the media was a violation of the ban on Promoting such offerings.
Fearing a repeat of the $550 million settlement resulting from an ealier SEC probe of Goldman Sachs practices, the investment bank decided to take the offering outside of SEC domain and not sell the IPO domestically.
Anything to do with Facebook is covered intensely by the media and it would be next to impossible for the IPO to not receive media coverage. Not selling Facebook to American clients is an unfortunate side effect of SEC vigilance.