I had every intention at the time to carry on with the Touch + Phone but there came I point where I thought I should treat myself (it replaced the Sharp GX30i I'd had for nearly 4 years) so I went for the iPhone, telling myself I could keep the Touch in the car.
Its expensive, but not long after I bought it they upgraded the tariff which made me feel a little better about the purchase.
I'm really looking forward to what the SDK brings to the table. Massive potential. The only concern I have is many of these new apps are going to highlight the low speed of EDGE. I think its going to start looking really old really fast. (some people would say its already old)
But, alas, thats technology for you. I don't regret buying mine.