Does anyone know where I can find the rpm gstreamer0.10-plugins-ugly-multiverse ?

I have checked all over rpmfusion, rpmfind, rpm.pbone.net and cannot find.

In Fedora 11, I think it's just yum install gstreamer-plugins-ugly. I don't see a multiverse listed separately. Current version is 0.10.12-2.fc11 (i586). I'm not close to my F12 box at the moment to confirm it's presence in F12 repos.

In F12, I have these and I do not think anything is missing:

$ rpm -qa|grep gstreamer
gstreamer-python-0.10.16-1.fc12.x86_64
bluez-gstreamer-4.58-1.fc12.x86_64
PackageKit-gstreamer-plugin-0.5.4-0.4.20091029git.fc12.x86_64
gstreamer-plugins-good-0.10.17-3.fc12.x86_64
gstreamer-0.10.25.1-2.fc12.i686
gstreamer-plugins-bad-0.10.17-2.fc12.x86_64
gstreamer-plugins-ugly-0.10.13-1.fc12.x86_64
gstreamer-ffmpeg-0.10.9-1.fc12.x86_64
gstreamer-plugins-base-0.10.25.1-2.fc12.x86_64
gstreamer-tools-0.10.25.1-2.fc12.x86_64
gstreamer-plugins-flumpegdemux-0.10.15-8.fc12.x86_64
gstreamer-0.10.25.1-2.fc12.x86_64

Some of them, like gstreamer-plugins-bad, are from http://nonfree.rpmfusion.org/ repository.

The reason I need gstreamer-plugins-ugly-multiverse is to comvert .wma files to .mp3 in sound-converter.

From what I can see, multiverse seems specific to Ubuntu. Although I have never converted wma files to mp3, I have no problem doing anything with either file in Fedora. I used autoten to install my codecs (there's one choice to install every conceivable codec). So, I'm guessing you have the correct gstreamer plugins installed, but may not have all the correct codecs. I've searched Fedora, and from what I can see, there are no multiverse apps available in any of the non-free repos. In autoten I installed dvd codecs, most codecs and mp3 codecs to make sure I had them all. The link to the autoten script is here:
http://dnmouse.org/forum/viewtopic.php?f=2&t=105
You can also link to his forums which show step by step what the program is doing here:
http://dnmouse.org/forum/viewforum.php?f=3
Sometimes I don't use autoten, but refer to these forums to see what I have to do in cli in order to do file conversions, etc.

Hoped this helped.