To date, out of all Wii homebrew apps, I think MAYBE only GeeXbox supports replay gain tags. For such an awesome and amazing feature, it’s honestly very sad to see how little support it gets on ANY platform – I don’t know how anyone can handle the volume changes between songs otherwise.
The alternative, using WaveGain and upsampling to 24bit, isn’t exactly light on storage space (50% more).
If this gets implemented, you guys will be awesome. WavPack support by itself is nice, but THIS is the killer feature for me. The ability to play a an entire folder AND shuffle playback was already awesome enough, but that along with WavPack + this would just be ABSOLUTELY GAR.