AC3 and SX3

[cpl_crud]

hiya.
I know SX3 rocks everyone's world, yadda yadda, and I'm going to buy it (eventually- SL2 is starting to look kinda lame...), but I was just having a think about acually mastering things.

What file outputs are available, especially for 5.1 mixes? Can you output an AC3 file? Or is there some new uber-format that you use for 5.1 (like, to go onto a DVD-A etc)? If so, what is it? Or, in the case of your 5.1 mixes, do you just end up with 3 stereo/6 mono wavs?

Can you produce CDs/DVD-As with SX3, or does it just make the wav files, and you have to use some other program to publish the CD/DVD-A?

Thanks in advance.