As far as I can see these are the likelihoods...
If we prepare seaming pitches it's fairly obvious Aus will steamroller us. McGrath, and probably Gillespie and Kasprowicz too, will knock us over any day of any week on a green seamer. Yes, Hoggard will probably be a handful and would almost certainly knock-over the left-handed openers more often than not, but as for the rest - forget it. Ponting and Katich, and probably Martyn and Gilchrist too, will have no trouble against Flintoff and Harmison because they tend to bowl too short, and Jones because, well, he's hardly ever bowled in seaming conditions and frankly there's nothing in the way he's bowled so far in his career to suggest that he'd do anywhere near as well as M, G and K. And even in the almost impossible event that M, G and K all wasted the seaming conditions, Warne would probably mop-up the mess like he can in any conditions.
If we prepare flat pitches Aus will probably hammer us even worse than if we prepared seamers. Even though it'd give our batsmen a chance of combatting M, G and K I'd not bank on it and it'd not help much against Warne at all. And of course once you get a flat pitch it reduces our chances of knocking-over Australia to something close to zero, even if we don't drop a single catch all series. All Australia's batsmen are proven massive scorers on flat decks and we'd have little chance of exploiting the weakness of any, bar perhaps Hoggard using swing on the openers.
If we prepare turning, slightly uneven pitches that gives us our best chance. It does not make us favourites or anything close to it, but it brings Giles into the game. There's still, of course, a chance of Hoggard knocking-over Hayden early and if he can do that then I'd back Giles against Langer, Ponting, Gilchrist and Clarke. What really irritates me is the "what Giles can do Warne can do better" comment that always emerges here. Yes, we all know Warne is a better bowler than Giles. Does anyone seriously think that needs pointing-out? The point is a turning pitch will simply turn Warne from very dangerous to deadly, but will turn Giles from useless into highly effective. Hence this is what will close the gap most, and the unevenness also brings in the possibility (no more than that IMO) of Harmison and Flintoff entering the game. Of course, too, uneven pitch plays into the hands of M, and to a lesser extent G and K, but we know that.
The simple fact of the matter is, Australia have got more angles covered than us - we know that, they're the better side by far.
But please don't insult us by suggesting MacGill will have an influence!