Well this is probably the first part of some future rants about wrestling championships, but feel like starting here...
Was looking at Wikipedia's record of WWE Triple Crown winners (
http://en.wikipedia.org/wiki/Triple_Crown_Championship), and notice something interesting. It seems to be a Triple Crown winner, you could win either set of World Championships or Tag Team Championships, but only considers IC Champions and not US Champions. Granted, this is also Wikipedia mentioned here so it's not like it's an offical thing, and with the devalue of championships it probably doesn't matter anyway.
However, I think if you can mix and match both top-tier and tag belts for this award, 2nd-tiers should both be counted as well.