Nobody has mentioned RightSignature yet. They've been around for a while, and I've used their services for a long time as well (...and, helped bootstrap the co

Nobody has mentioned RightSignature yet. They've been around for a while, and I've used their services for a long time as well (...and, helped bootstrap the codebase). That said, I like the simple UI of Hello Sign thus far... but, I got a never-ending spinner when I tried to draw and submit a signature... and, when I tried to upload a document (it hung at "Converting..."). The price is definitely right, that's for sure. I'm very curious to see what the paid features are going to be... and how long things are going to be free. Running clusters of high powered document converting machines is not cheap!