What you need to add to make this app really great...

*deleting maps
*dragging objects to wanted position
*at least 2 different object shapes (ellipse and bar)
*at least 2 different link end shapes (none and arrow)
*at least 2 different font sizes
*changing link color
*switching between curved and angled link shapes (latter one to create a pedigree, for example)

If you succeed in adding the above features, Im sure you will get many very good ratings and many happy customers that will pay with pleasure!

iFreak1234 about Total Recall - Mind Map