I usually park the car at the missus work and walk five minutes to the stadium/arena h34r:+1
Best thing you'll ever do for yourself.
When a big gig is on at Acer/ANZ the place is an absolute shamble for transport of any type...especially car! Don't park in Acer carpark if you don't want to wait hours!!!!
But as Thommo mentioned, Concord West isn't too far away at all by foot (a nice walk through bicentenial park) and gets reasonably regular train services. We often park our cars there when big gigs are on. 20 minutes walk vs ~200 minutes in waiting, I know where i'd rather be!
At least that is what Ill be doing this Sunday arvo for top gear, also scored massively discounted tickets through her social club.