jimbeetle - 9:07 pm on Oct 13, 2010 (gmt 0)
Maybe go the web badge route. If it's a national event it's probably prestigious enough for folks to display "Gold Sponsor of..." or "We're Participating in..." badges. Kind of like you're actually "giving" them something instead of just asking for a link.
Repeatable? As long as the guy who comes after you doesn't muck it up ;-)