Definitely +1 on the "view all notes" options. Knowing full well that Ghostnote was intended for people like me that don't necessarily use structure for note-taking and need the context, I don't want to find my self in a position of not being able to find an important note because I'm not looking at that file/URL at that moment.
Some things that I think would make this an awesome app:
1) IFTTT integration would be sweet. "If i get an e-mail about something, remind me to do it by putting it in my contextual note for an application"
2) iCloud integration would be sweeter. Unified notes for applications that exist in "desktop form" and "mobile form".
3) A "view all notes" option to be able to browse sans-context
4) The ability to clip media into a note easily