“Open up a PDF in Preview. Click the annotations button , then click the signature button , then hit “Create Signature from Built-in iSight”. Scribe your signature onto a white piece of paper, hold it up to your iSight, and bam: you’ve got a stampable version of your signature sitting in Preview. Mr. Printer, meet Mr. Trash Can.” — via Nine Things You Should Do After Installing OS X Lion | TechCrunch.