Steaming is consuming bandwidth no matter how we twist and turn. Always test your Internet options at a venue a couple of days before an event. Many time the 3G network works like a charm, but sometimes you might be able to use wifi or wimax, or even Ethernet.
In Sweden you can test bandwidth at http://www.bredbandskollen.se/.
Very good download speed here, but note that the uplink is only 860 Kbit/second. Still it is above the required level and you can try a high-quality 500K bitrate.
