The amount of patching needed really makes it not an app that would combine all features. If someone writes an app for say bbc, with live updates, you could apply above mentioned patches (or write them) to behave like a live tile, still not sure if placing it on the multitask view is the correct way to go, check meecast widget/plugin for lockscreen, this would seem like a better place for such thing (at least in my usage case I switch between apps more often than would glance on new snippets of info)