Will the Apple PDA click!!

When the Apply iPhone became a phenomena, It was quite obvious to me that they would eventually come up with a iPod which was similar looking to iPhone (with the multi-touch screen). It happened and then iPod Touch was introduced recently.

I was thinking as to why would Apple stop with that and why would they not extend it as a mobile computer/handheld. So now we get to hear rumours about Apple's coming up with their PDA :).

But as I think deeper.. would I be interested in a Apple PDA as a standalone device. Why would I buy an apple PDA if the PDA like functionalities could be clubbed with mobile phone capabilities as in iPhone.

When the world is moving towards convergence, would a strategy to diverge work out?. My instinct says NO. But probably the business/market analyst at Apple can better explain.