I've read that some people were able to get the ripped threaded app from a Treo ROM to work (there are two version one for wm5 and one for wm6) on their Qs and similar type phones (smartphones - no touchscreen - landscape screens). However the problem with the app is that there is no "backspace" key mapped to the app, pressing the backspace key on the Q simply exists the app and the text is extremely small. Furthermore you cannot uninstall the app - only master reset or restoring the phone via a backup. I've used the ripped Palm Threaded app on my previous wm5 Touchscreen device and it was fine for the most part. Here's a link to a page where the guy has posted screenshots and his current findings:
http://gadgetsonthego.net/2007/03/pa...orks-on-t.html
there is also another application that's supposed to work located here:
http://oldsap.blogspot.com/2007/08/s...excalibur.html
If you read in the comments you'll discover that it isn't perfect either...
But seeing as how we're discussing this I thought I'd round out the contenders.