Have you heard any news on these reconyx cameras? yeah they are expensive, but they are UNREAL. the trigger speed is like 0.146 seconds. Plus they take a CRAP ton of pics on burst mode.
Also, I have my eye on one of those new plot watcher cams. They are looking more and more interesting to me- however, the only thing I don't like is having to go through 1,000's and 1,000's of pics with nothing on them. They just take a pic every so often on a constant basis. My only trouble with them would be finding that perfect place to put one.