But there is at least one other context where you want the data delivered in stream mode, namely when using Netscape as a client for a videoconferencing system on a local or throughput-controlled, network. What we do.
If you're interesting in this toy, you can get the binary here. To use it, just put it into your ~/.netscape/plugins directory before launching Netscape (it's linked with SGI's audio library, but everything should be fine).
You can also get the sources. See the README file to compile and install it.
This has been developped in C using Netscape plugin SDK for Unix, v3.0b5.