Shockingly, it seems no one has bothered to try this!
So I’m putting this post up in the hopes someone with a rooted Nook Touch will see it and try it.
Nook Devs reports Graffiti for Android Pro gets a “Perfect” score on the NookColor (do Find->Graffiti on that page).
But that’s an LCD screen. Would it work with an eInk screen?
If you have a rooted Nook Touch, give this a try and report in Comments. Even better, if you can post a YouTube video, I’ll also post it here!
After the break, a video showing how to install Graffiti for Android.
Additional:
Mike Cane’s xBlog 
i installed it, but i don’t know, how to enable it, as long as the settings are not the normal settings on the nook touch.
You should be able to use it in any text field. For instance, use the Find field and tap and hold inside it to be able to select a different input method. See about 1:10 in this video:
https://mikecanex.wordpress.com/2011/09/02/new-sony-reader-wifi-is-android-underneath/
Yeah, I know. the Problem is before that part. In the Nook settings, there is no “Language & Keyboard”, neither in the Nook Color Tools. The Part in the Video above at about 1:00. I can’t enable Graffiti.
Ah! Likely because Nook is meant for English-only. This might mean — if it can be rooted — it can be chosen on the Sony Reader, since it’s built for international markets. We’ll have to see. Thanks for trying.
I don’t know how responsive a IR-touch screen would be…
The Sony Reader is made for taking handwritten notes. Graffiti should be no problem for it.