Since we are currently working on documentation there are some not well know features that are in Scribble Maps but not well documented, or under utilized.
Ctrl-Z: While we have undo buttons listed in Pro, ctrl-z actually works in Scribble Maps as well, this allows you to undo the last action you did, including erase.
Ctrl-S: This is a quick key to rapidly save your map, if you have already specified a password, this will quickly save the map, great for working on large projects.
Map Importing: Maps can actually be imported into other maps, or used to duplicate a map to another other id. This functionality can be found under load/import.
KML Feed Support: KML can be loaded directly into a widget by adding the flash var kml=path, further more, KML can be loaded directly into scribble maps via the following url http://www.scribblemaps.com/#q=path.
OpenStreetMap & CloudMade: In addition to Google, Scribble Maps also support OpenStreetMap and cloudmade tile layers, that you can draw all over.
3D Widgets: Perspective views can be saved and loaded in a widget.
Requesting Features: We are constantly adding features, we have implemented a large percent of user feature requests, we rarely say no, and we are currently working on multiple user requested features.
Map Directory: Maps can be viewed as they are created at www.scribblemaps.com/maps/