I tried to save last night and it simply said that I had a wrong username/password combo. The only action available was printing to pdf form. I just tried again and it did allow me to register though. Was something changed or maybe I missed something late last night....
I have been meaning to update my resume for a while now and this is the perfect tool to launch me into action.
You may want to make it more obvious that you registering/saving is actually creating an account.
Also, please introduce an auto-save feature.. it would have been very annoying if it didn't save properly! In fact, I was thinking, while using the product, "I am going to be so annoyed if it doesn't save properly!" - That makes for bad customer experience :)