I would've chosen him over Harmison, but either will do as a straight swap for Sidey-B, who should never have played while obviously unfit.
Ever so slightly confused by the selection nearer the top of the order. I'm glad to see Broad back in, as his runs would've made a lot of difference last time out. But frankly I'd have brought him back for Collingwood, who for me needs to play more than one good innings to convince me he's worth the gamble. Bopara, seeing as they put him in the squad, should've got the nod to replace Vaughan. Although I reckon they should have called up Key or Shah.
I suppose KP and selectors will want to give a chance to the existing team before they start making wholesale changes. It needs to be a last chance for some though, notably Bell, Collingwood, Ambrose and Strauss. Quite clearly Ambrose shouldn't be there in the first place. But Strauss and Bell both need to play proper quality innings to save their test skins; they need to prove that they can stand up to scrutiny, not just score when there's no pressure.