Need a low budget solution for Live Streaming

I am looking for a low budget solution for live streaming. We are currently using Streamhoster but are not happy with their product.

We would like to find a vendor that meets as many of the following features as possible:

1.) Embed a nice looking viewer on our website so our audience stays on our site
2.) No contracts
3.) Pay for what you use
4.) Don't have to pay for things we won't be using (i.e., Storage space for on-demand)
5.) Easy to understand setup and configuration
6.) A known solution provider (you have experience with them)
7.) You can point us to websites that use this service

We are moving all of our on-demand videos to Amazon S3 for the economy of unlimited storage at very reasonable rates.

Now we just need to find a reasonable solution for our live streaming.


Thanks,

Frank