Stypi has support for code formatting and syntax highlighting, and lets you play back all your edits. To my knowledge etherpad did not have these features.
Sort of saddens me,these guys came to pick-up where Etherpad guys left and change the online writing. And after first release there was no major update.
Congrats Jason and Byron. Glad that the product will live on - Stypi is great for asking short coding questions during Skype/telephone interviews. Everyone I've interviewed using Stypi has said something positive about it.
Not sure what this product offers over the (awesome) work done by ShareJS and ACE already. Looks like stypi is using both those products for it's core functionality
