Okay, I'll jump back into this one as well. It's clear that there is confusion on drops for a bunch of rules on where, how far, etc -- seems to help pretty regularly on tour (and club events) and DQ's penalties are usually overlooked by most of us because they aren't Tiger. This year he got his share (Dubai, Players, Masters, BMW).
Regarding the BMW Championship (Western Open) -- only after seeing in it on slow mo HD was it clear that the ball moved. I just read a quote from Slugger White, the PGA Rules Official that made the ruling, that said that it would have been difficult for Tiger to see that movement from his angle, and at normal speed, of less than 1/8".
It's time that the Tour either embraces the HD, 3rd Party call-in's or rejects them. The big tournaments already keep a rules official close by or in the groups. They have TV on every shot so why not just allow the players to use them instead of relying on human judgement when they are evaluated by higher standards. Seems like most sports have gone to instant reply on the spot for anything controversial, so why should golf be different.
It would be interesting to see what rules questions, uncertainty, and infractions have on the pace of play and the impact on time of a dedicated per group rules official and video replay.