Ok got the dll working, seems to work fine in my tests. Also included is a little alias $oggcomment.
$oggcomment(filename).info ie:
$oggcomment(mysong.ogg).artist
The ".info" part, the dll will accept anything, meaning whatever tags are in the .ogg file, the dll will let you access. I really don't know if there are standardized names but the ones I've tested:
artist, title, album, tracknumber,genre,date but it seems some .ogg files use different names for things, like I have one that has encoded_using, another that has encodedby. I guess just play around with it.
Anyway to get it:
www.codemastr.com/ogg.zip, source
www.codemastr.com/ogg-src.zip. And a note to anyone who gets the source, it requires libogg and libvorbis to work.
Hope that helps