Gongrats Alpha, you have converted me into using Oggs as my preferred music format over mp3s

. They truly sound just as good (or better), while consuming less disk space.
As for XMPlay, there seems to be a tiny little bug in editing the Ogg tags: when you update the tag, the playlist stops responding to normal keyboard commands, until you:
1. move the mouse over the list
2. press a global hotkey for 'volume up/down' or 'open info window'
3. minimize the player / switch program
Sounds a bit like the timer jamming bug really

.