I saw that the new version of Appigo's ToDo.app mentions something called Appigo Notebook. I quick Google found this: Upcoming App - Appigo's Notebook. (Update: official site)
Ahh. Yes. Good. I will be looking for it -- as soon as I get iPhone 2.1 and, I hope, get beyond the !@#$ Apple bug that prevents me from time effectively updating my iPhone apps.
Farewell Evernote, good-bye data lock.
Update 9/27/08: Toodledo has introduced Palm/Outlook Memo/Task import to their notes as CSV files. So now I can fully use Appigo Notebook.