As far as I am aware, their position is actually pretty popular (see the link replying to goblinpaladin). In fact, the split is verifiably strange (http://en.wikipedia.org/wiki/Newcomb's_paradox):

In his 1969 article, Nozick noted that "To almost everyone, it is perfectly clear and obvious what should be done. The difficulty is that these people seem to divide almost evenly on the problem, with large numbers thinking that the opposing half is just being silly."

I think you can read the beginning of Nozick's essay here. (http://books.google.com/books?hl=en&lr=&id=gjA-OLUWiSUC&oi=fnd&pg=PA207&dq=%22Nozick%22+%229.+Newcomb%27s+problem+and+two+principles+of+choice%22+&ots=Fy51ZWvvM3&sig=pm1WNxRic_wiswB3ibGW8zy9zq0#PPA209,M1)