I really don't know how I would live without google! Here's a post from someones blog:
"Last night I got to play in what I believe to be the first ever online HORSE tournament. It was a private tournament on Full Tilt that I was able to get the password for. It was a lot of fun but I didn't last too long. If you don't know, HORSE is a multi game event which (usually changes each table round) but here they changed the game every 10 minutes...each time the blinds went up."
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http://scottwire.blogspot.com/
The post was made Feb. 24th, 2005. If FTP still runs these then good on them.