DSmerlin has been updated. It is a port of the open source XMerlin handwriting recognition project for the Nintendo DS. Changes:

To improve recognition accuracy, multiple gestures for each character have been removed. There is now only 1 way to draw each character. Gestures also more closely match the Graffiti style.

Numeric characters 0-9 are now recognized.

Gestures have been added for space, backspace and return.

http://ds.crmx.us/dsmerlin/index.html