I am not sure how closely the developers folllow the main jQuery Mobile forum but today i posted an announcement of my mobile twitter client based on jQuery Mobile. It is an open source project located on Github.
I am not sure if the JQM team has plans to support fully dynamic app's anytime soon but i have identified features that i would like to see when you do. They are all explained in the README file of the project. The source also contains workarounds that i have implemented that allow me to work in the current alpha release.
Feel free to contact me if you have any questions, clarifications, etc associated with the project.
Thanks and keep up the good work.
Richard