[edd]

It really depends on the content you are distributing too, as streaming can really reduce bandwidth. Streaming works much better if you are sending very long recordings as most people won't download the whole thing if you stream it. We found that it really reduced our bandwidth when we moved some long video's to stream rather than using progressive download.

[m_eiman]

Add rate limiting and something like mod_h264_streaming for skipping ahead in the content and you get most of those benefits.

The main thing streaming can do that progressive downloads cannot is live content.