I use Live for 6 channel performances quite often using M4L as a workaround, but it is a royal pain to get working even close to correctly. And no, Logic is not the way to go for this, as ReWire disables M4L where I build my stochastic systems.
And yes, I have to bring my own speakers.
I use Logic for my film work, and it is great but I would use Live way more if it had 5.1. The auto-fades on clips in Arrange are a huge time saver that Logic doesn't have at all.
I also use Live for sound art installations, but sometimes the lack of proper surround means that I have needed to go to MAX/MSP or Logic to get it done.
I love the workflow in Live more than any other program, and having surround support would be fantastic.
I would even pay for this as a paid upgrade.
