This is a good example of why software patents are ridiculous. Graffiti is perfectly useful technology - it would be wonderful to have Graffiti on the iPad, in my opinion.
But alas, it cannot be done, because: patents and 'intellectual property'.
There's an Android app that perfectly recreates a Graffiti keyboard as an Android keyboard. Works quite well, you just need a capacitive stylus with most phones now.
I actually loved Graffiti - much faster with it than Swype which is bundled with my Samsung Galaxy SII. Partly that's because I hate the predictive nature - being quite bilingual it's a pain to keep switching languages.
But alas, it cannot be done, because: patents and 'intellectual property'.