Our site has its own updater.
Windows:
http://www.wowinterface.com/download...r-Windows.html
Mac/Linux:
http://www.wowinterface.com/download...Macintosh.html
Or you can set it up so that you get emailed every time something on your wowi favorites list gets updated.
Or, you can do what Slakah suggested and use an updater that pulls from all of the major sites.
Limiting yourself to only what is on WAU is just that - limiting yourself.
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff,
The Tao of Pooh