I'm not an expert on this, but here's what I have personally noticed about wavpack that seems to make it as good as, if not better than, flac:

• slightly better compression ratio
• much faster compression speed
• fast seeking
• stores wave md5 signature just like flac fingerprint
• APE2 tags
• full FB2k support

I don't know of any portables that support it, but I don't have a portable so I don't keep up on that area. If I did have a portable, I wouldn't use a lossless format with it anyway.

We should seriously consider allowing the wavpack format here at TTD. Here's the link to the wavpack website: http://www.wavpack.com/