I'm implementing both facebook connect and Twitter+Oauth for an iPhone app I'm currently working on. I really like the way facebook connect makes it seem that you're still in the app and not visiting some external website. Also, it kind of messes with the flow of my app because when you sign into facebook connect you have this snappy interface and when you sign into Twitter+Oauth you can really notice that you're being redirected to a website.
So, what I'm wanting to do is make my Twitter+Oauth process be more like, if not identical, to how facebook connect works. My question is, does the user need to know that they are going to twitter to login? Most users are probably unaware that they are using a webpage when they are using facebook connect. In my scenerio, would it be better to imitate the facebook connect experience or just keep it where you know you're being sent to twitter?