According to this story, that Electronic Signatures Act (S.761) that Clinton recently signed is wide open to abuses, because it doesn't require encryption.
In fact, the article suggests that all sorts of easily forged user actions, such as e-mails or even keypresses on a telephone pad, will be legally binding. As Clinton might say, it depends on what the definition of "signature" is.
Lots of fancy names are quoted as being concerned: National consumer Law Center, Consumer Project on Technology, even an IPsec co-author.
Just sensationalism? Let's hope. This doesn't exactly give me the warm fuzzies. But then I could be biased. I simply don't trust anything that has a grandstanding politician involved in its promotion. Or any man with too much power and too little regard for the truth, especially if his name is Bill.