Sure thing I'm going

And of course there are busses - as far as I know they even sold those shuttle bus tickets along with the concert ticket.
I'll be staying at a friend in Vienna, so I guess we'll be there as early as possible. (and I feel that we'll find a cheaper way than those € 20 bus tickets ^^-... )

I don't know if you're German speaking? If so you could check out the Magna Racino site or the ÖBB site