These transactions will confirm eventually.

They are almost certainly intended to defeat pseudonymity.  This is discussed extensively in other threads.  There is also  free software available to get rid of them, at least for bitcoin-qt.

With regards to the original question about how many people have received these, I think it might be easier to ask who has conducted a bitcoin transaction over the past week and has not received any gifts of this one-Satoshi-spam.  It seems that whomever is sending these is spamming the entire blockchain.