The GStreamer FFMPEG and FLV Plugins are available from my repository at http://ips.homeunix.com:10906.
You will need to install MBLgst-plugin-flv and MBLgst-plugin-ffmpeg to play most flash video files.

Please note that the GStreamer FFMPEG plugin is still fairly unstable. For example, Totem crashes when trying to play an mkv file. This is overcome by installing the Fluendo GStreamer Plugins.
Update : I just found this bug report regarding the Totem crash with mkv and h264 files. It appears to be fixed in the newer GStreamer FFMPEG plugin but we'll have to wait until the next OpenSolaris version. OpenSolaris 1002 includes the updated GStreamer which is required for the newer FFMPEG plugin.
If you have any other issues/feedback please send me an email (mblakeman@netspace.net.au) or leave a comment.
Enjoy
gtkpod & gpodder
Any chance you want to build these 2 packages? gtkpod with the ability to copy videos over to the ipod too.
Thanks for the repository!
RE : gtkpod & gpodder
I'll have a go over the coming weeks. Thanks for your comment :-)