This plays a sound every hour:
http://www.wowinterface.com/download...keruClock.html (but doesn't chime to *give* the hour)
/edit: it also plugs into LibSharedMedia, so any sound you have available in the game with that, Broker_uClock can use.
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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