For streamers wanting some help with settings:
I run on 6-700 kbps upload, so I'm not able to stream HD. However, it's still possible to get the image quality good enough that you can read the in-game chat.
I'm running on Adobe Flash Media Live Encoder, so I suggest you get that for streaming. Of course you'll also need a screen capture software, I'm running VHScrCap.
The Screen capture is simple enough, just set the area you want to capture. As for the streaming software, you can get the stream information from your streaming site, if they have a config or dashboard. You'll need their flash server address and channel key.
To improve the image quality you need to do a few things.
1. Identify your upload speed. I suggest going to Speedtest.net and try a server that's somewhat far away. (I live in the Philippines and tested versus a CA Westcoast Server).
2. Once you know your Upload speed, set your bitrate on the FMLE so that you have at least 100 Kbps left on your upload bandwidth (other people suggest 20-25% of your bandwidth remaining).
3. Set your input and output resolution. The input is what size your media encoder will ENCODE for the stream, the output is what your encoder will UPLOAD (this will affect what the image will look like when put in fullscreen). Input is dependent on what your CPU can handle, output has no real issues that I've seen. Set your output BELOW or AT your input level to avoid image degradation.
Note: The higher the input, the better the source image, the better the output, the better the stream will look minimized and maximized.
4. You can set the audio line in audio. No real issues here, it's easier if you have a mic so you can just record your speakers. Or you can try getting a virtual line in cable/getting your "internal mic to listen to itself"
5. Check the total bandwidth usage, should be somewhere in the bottom center. If you're good to go, make sure you "connect" to your stream and its server, then hit the Green Start button to begin encoding and uploading. Check your Streamer online and begin broadcast.