Gwabbit is an app that was introduced this year and runs through your email for signatures. Once it finds the signature it then adds that person to your contacts. This app is now available as a download through beta. Final touches are currently being made and should be available on May 26th.
Beta link may be disabled as of now, but should be made public on the above mentioned date.
via:
Email sig to contact app gwabbit Beta test available | BlackBerry Cool 
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