it's not that hard to do the streaming
have a mixer (I like the mackie 1402vlz pro) take the record output and use an ipod (1/4" M minijack -> M RCA) adapter and plug that into the back of a computer that preferably has linux loaded. A laptop is not recommended as I've never had good experiences using them for this. you only need 100kbps for the streams as it's not like you're trying to stream high quality audio. I don't remember what the video streams require, I think it's 600kbps?
setup ices on it, send it to an icecast server and have relays off of that. I did it with freematrix radio and at the first conference and it worked fine except for the random dropouts because everything was working off wireless only, and we all know how reliable wireless is...
there is also a java based ogg player that I used with freematrix radio and I believe I still have.
On the other hand taking the recordings and making decent release version is a bit more time consuming and requires a team of dedicated people.
Sorry I didn't help out this year, I had my reasons though.
cheers, Kyle