While it's not uncommon to see people ask for autographs, you have to admit that this was cool!
You can get Adobe Ideas for FREE here from the 
Yes it can be awkward signing with your finger so get a stylus!
If you're going to be a doing a lot of these, you might want to make an investment in a iPhone stylus to make it easier for your clients to sign. I got one of these and I LOVE IT! Makes it so much easier to sign!
