Not sure if any other network provider is doing this, but I asked a t-mobile shop if they would reserve a ipad2 for me on launch day tomorrow to which they said Yes and took my name as they actually have them in stock already for the big day tomorrow,
So I am picking mine up tomorrow at 5pm, give your local store a call in the morning.
Just thought I would let everyone know, especially if your worried about queueing up or shops running out of stock..
I wasn't even asked if I was buying it or getting it on a mobile broadband tarrif so I am assuming both options are available.
Might be worth a shot with t-mobile and any other operators..