i am actually quite attracted to Appcelerator Titanium at first but after using it (or rather learning it) for sometime, i wonder if its better to use something like ExtJS(Sencha)/HTML5 provided the app don't require File System access?
if the app requires file system access i will have no choice but use Titanium right? if so, will it be better to open Titanium windows/dialogs or use js dialogs (eg ExtJS/boxy's) one - will be constraint to main application window as if it were a browser?