Message in my hand writing, or yours (idea no. 91)
There are some applications in the market that convert a text message to an MMS, such as an animated message (or avatar). Using a technology like Fontifier, which can create fonts from your hand-writing, it would be possible to send "hand written" notelets.
Buy my book (Amazon US/UK)
Join my email list
Subscribe to my "100 Mobile Product Ideas" free e-book