I'm from Greece. My uses of OGG Vorbis and OGG Theora.
I listen to music in Vorbis. I also watch videos in Theora. I've played GTA: Vice City to check for Vorbis support. I checked both the CD and the installed files in C:\Program Files\Rockstar Games\Grand Theft Auto Vice City\Audio . All files either .adf , .RAW, .wav or .mp3 files.
I got an audio player that supports OGG Vorbis that is called Sansa Clip 2GB. It cost me 40€. Now the prices have fallen a bit and now it costs 35€.
Someone gave me as a present an audio player that doesn't play the free formats like Vorbis, so I guess I'll do them a favor if I notify them that it is in their own interest to support this free and patent-free codec for their firmware. No the free/libre software Rockbox doesn't work on it yet!