Can't really read too much into the 51 against WI, June/July and still a bit away and things can change hugely between now and then, especially when both teams have big series coming up.
Sure be an interesting matchup though, although I'd probably be a scrappy contest between two equally 'poor' sides. The Aussie batting is at its lowest in a long time and especially with the middle order if the likes of Symonds or McDonald play. Any type of swing bowling can run through it. But on the other hand, I really don't rate England's bowling attack. You've only go Panesar (who's a bit out of it at the moment), Sidebottom and Flintoff at international standard. Broad seems to be a sort of a nothing bowler really, can't get lateral movement in the air or off the pitch and doesn't have enough pace to make up for that. He seems pretty innocuous. Anderson from what I've heard and seen seems to a have a bit of ability to swing the rock, but just can't getting any control over it.
Bowling for the Aussies is the same, vastly inexperienced, if Lee plays he'll be woefully out of touch coming off a 6 month layoff, ditto with Clark, so basically our two best bowlers down. Then you have Bollinger who's yet unproven, as with Hilfenhaus and Siddle who needs to get his fitness up before he can cement his spot. Pit this against a misfiring England batting lineup with passengers such as Collingwood, Bell and Strauss and you have an close 2005-esque series.