A new version of Redfire (0.0.3.0) has been posted on project site http://code.google.com/p/redfire/
It has three major changes
The Redfire plugin for Spark now uses the multicast DNS protocol to auto-discover the Redfire plugin for Openfire and obtain the server address and port number in order to load the web pages for the audio/video chat. I have not tested it properly, so please report any issues found.
Support for RTMFP has been added using Cumulus OpenRTMFP server. It is disabled by default as the binary for only Windows is provided. Linux users must download and build the binary from source and point the “cumulus.path” Openfire property at the binary file location. When enabled, all audio/video calls can be peer to peer using UDP instead of TCP and improving performance.
I still do not have a 64-bit Windows PC, so all reported issues with redfire plugin for Spark on 64-bit PCs have not been fixed.