Hayden not batting well at all ... but I think he will retain his place comfortably. His first-slipping for Warne is probably enough. One of the disadvantages of such a settled side is that guys like Hodge and Hussey havent really had a chance to show if they are up to test match cricket.
On the surface of it, MacGill could be brought in, but there are a few issues. Firstly, he tends to be a LOT less accurate than Warne - Flintoff and Pietersen could really take to him. Secondly, perhaps the English batsmen would start working out how to play legspin bowling if they were to see it from both ends for extended periods, and thirdly, Warne in the past has ahd less impact when MacGill plays.
I'd like to see Tait in. Either Gillespie or Kaspa has to go. It really should be Gillespie (2 wickets out of 40), but I have a feeling that Kaspa will be a scapegoat and never play for Australia again...