broadcast depends on the venue. If they have the gear it can be done, but I\'m not about to go out and buy all that equipment, plus it would be one (or more) person added to a full van as is, plus gear. Also, if a band had a mobile webcast system on tour with them, it could potentially hurt ticket sales. After all, if this was available on tour, why not do it at home as well? Why ever go to a show? just watch it at home on your computer.
end result - suck it up and go to a show or wait for them to come back.