Superpad was, as I recall, the first app to break the 4K memo limit. It's still available from PalmPilot Gear HQ, but doesn't seem to have a home page any longer. No, this is a limit imposed by the desktop PalmPilot software and we currently do not have a workaround. Secure Memo Pad by Certicom is an example of an encrypted memo app. There's controversy about whether an outliner app should store its outlines in one big PDB database, or use a storage system where each outline has its own PDB file.
Some correspondents prefer one database for ease in backing up.
Backing up is much less of a problem now that BackupBuddyNG has hit the streets anyway. Compatibility is a problem. Individual Outliner App Reviews 1. Each database is a tree. Each tree hierarchically organizes the data into branches and leaves.