Question about camera output in webcast software, Windows Media Player 11/ bandwidth

When configuring the 'camera output' within the webcast software what is the recommended resolution? The dialogue box offers multiple options and I'm not clear as to the 'best' option. I've been selecting 1280 x 762 (?). Also, when viewing the downstream in WMP11 should the video be close to that output dimension? It seems like it's much smaller and I'm required to go 'full screen' in WMP11.
Could you share what your experience has been?

Does anyone use something other than 30 fps?

We only have 420k available for the upstream.

The lowest common denominator is the units receiving your broadcast. You need to be mindful of their connection speeds, and throttle down to suit. In my Stake, I'm streaming a very small window, to accommodate my slowest unit.

Note that Standard definition television is only about 640 x 480. Our new (replacement) projector I think is only 1024 x 768. Anything above the projector resolution is wasted bandwidth/CPU cycles.