Hello! I've been using Toodledo for quite a while now and I have a few suggestions for the devs.
Separate folders for the notebook and tasks - I have notes in a whole bunch of categories that I really don't want folders for in my tasks, because having those extra folders adds clutter. My GTD project support data is not and cannot be in Toodledo's notebook. I use the notebook for things like "Gift ideas", "Someday/Maybe", and "Books to read".
Delay rollover for a "day" until 2-3 am - As a college student, I sometimes have some late nights. Being able to delay a "day" rollover would help a lot.
Notebook app for iPhone / iPod touch - Right now I use Appigo notebook, but I would love to see an app from the Toodledo devs. Syncing and formatting could be improved.