The CreatePDF app description states "Convert all your Office, Photoshop, ..., Text, and RTF files to PDF using 'Open In' to send the files to the CreatePDF application" (bolding mine). But I see no way in the iPhone Notes app to do an 'Open In'. Really?!? I can't even create a PDF from the standard Notes app?!?
notes in the notes-app are NOTES not FILES.
Conclusion: You cannot convert them.
You have take a detour via e.g. "docs to go" and save the note as word doc.
Then adobe does the job you expect....
Thanks for the quick reply. Frankly, notes not being a file is a technical distinction that is lost on all but the most savvy users. So there will be wide-spread disappointment that an intermediate step (and app) is required.