I have an issue with the "virtual" caching of anything. If somebody isn't going to actually GO to the cache and log it normally, then you shouldn't do a bug drop in/out of it, especially with something like the Jeeps, which are a hot commodity.
I'm still not sure how I feel about the "discovered" logging option. At a recent event there were people pouring over each other's books of coins, and recording the numbers for logging as "discovered". Shouldn't that be reserved for items that can be removed from a cache, but you choose not to?