The software for the treo you are talking about is called Nuance Voice Control. Its an awsome program. I used it a lot on my Treo and haven't on the touch yet, but its expensive ($6 a month or $72 a yr). If it wasn't so expensive I would get it. Here is a link for HTC TOUCH
http://store.handmark.com/p/1857/Nua...Subscription/-