The Wall Street Journal did a piece on the rising penetration of e-signatures:
"A lot has changed. Today, small companies such as ... EchoSign Inc. of Palo Alto, Calif., have launched Internet-based technology that makes signing contracts on a computer simpler and more user-friendly, often involving fewer clicks than buying a book or a pair of pants online. E-signature products also have gained legitimacy as they have withstood legal challenges, giving executives more confidence that contracts signed online are just as binding as pen-and-ink ones, said executives at companies that are using the technology now .... The new, Web-based e-signature services aren't as complicated to use because they don't require people to download special "digital certificates"
E-sign or fax-sign. Either way, EchoSign is the easiest way to get that deal closed!