libmpg123-0.dll by Covarr at 1:54 AM EST on January 21, 2009
I can't access the link in the vgmstream readme to download it, I keep getting a 502 error. Could somebody who has it please host it elsewhere, like on Rapidshare or something?
I don't currently have the means to upload the file in question, but according to this it should load for you eventually. Try it again later at a different time of day (or night, if you tried to get it at night and it didn't work). Sorry I can't be of more help, but I suspect that it should work for you. Mouser X over and out.
I went and build libvorbis myself, it cut down on size a lot and removed the dependency on libmmd.dll, and didn't notice any decode speed difference in my tests, either.
The new vgmstream build that links against this one is vgmstream r565, and as the readme says you can get the external dlls here (which also now includes the licenses for each which makes me feel better).