http://bugs.winehq.org/show_bug.cgi?id=17212
--- Comment #4 from Vitaliy Margolen vitaliy@kievinfo.com 2009-02-02 09:10:41 --- For one it won't ever extend to the entire system, even if in some distant future Wine will support pass-through aka filter drivers. Second - this is really moot point on *NIX - you _can_ read any file at anytime you want to, if you have access to it.
If you want a backup - nothing beats tar & gz in it's simplicity, flexibility and availability IMHO.