The screenshots and video demos of Mac OS X Lion keep on rolling round the web; and it is looking better and better to me the more I see of it.

Yet another cool feature is revealed today at 9to5Mac, thanks to a tip from their reader Mime454 – the ability to capture signatures with the Mac’s built-in camera.

It’s called ‘Signature Capture’ and it allows you to write your signature with a black pen on a piece of paper, hold it up to your Mac’s built-in camera, and place it on a document in Preview. The feature works as advertised and is very seamless. The image capture is also very quick and mostly accurate. We got decent-to-good results in all of ours tests and the best advice we have is to write very clearly. Following Apple’s instruction to use black pen is also a must. Using a blue pen, for example, gave us washed out results. We see this coming in handy a lot, especially in PDFs, and hopefully Apple makes it a framework that other companies can integrate into their applications.

I think this will be a very handy feature, assuming it makes it into the final release of Lion. What do you all think? Would this be a useful feature for you?

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