I love the iPhone app, and have gotten to where I rarely use my laptop with the full version. I think I could sell my laptop, and just use my iPhone except for one issue. I have a lot of notes, and I will periodically print them all off into a booklet. To do this I have to use the laptop. If you could change the website access to allow all notes to show up in a format which could be copied that would eliminate my last dependence on the laptop.
Even nicer would be the ability to print directly from the iPhone. I assume that would be a lot more work, but it would be great to print (or e-mail) one or all notes at once.
I also would suggest an option that would allow iPad/iPhone users to pay a monthly amount, and not need to invest in the desktop app version.
Blessings