EchoSign, the web-based electronic signatures and signature automation service, is launching new functionality today that allows users to use their web identities (Facebook, LinkedIn, Google) to e-sign contracts or other documents.

EchoSign’s electronic signature service lets you append digital signatures to contracts and other business documents, store them in digital form, and manage those documents without printing them out and faxing them. Currently,

Patent troll extraordinaire NTP Inc. has already sued just about everyone in the mobile industry (famously Research In Motion but also Apple, Google, HTC, LG, Microsoft, Motorola, AT&T, Sprint Nextel, T-Mobile, and Verizon Wireless) and now appears to have found a new target, one