The problem with "2.0"

Ryan Bretag posted a great little gem on the potential confusion caused by the recent "2.0"craze. So many terms (even in education) are getting the 2.0 treatment with unfortunately too little explication.
I agree that there is a more-than-trivial danger in applying a versioning scheme to learning and educational practice.
This may quickly get out of hand with everyone upping the ante, supposedly indicating that they have superior, latest-greatest teaching and learning going on.
If you think it's a puzzle now, just wait till some institutions/technologists start hawking and presenting at conferences on their new Learning 5.0 wares and methods!
I'm with Ryan on his trend-setting suggestion--i.e. start a trend of NOT using 2.0 language if we can help ourselves. I find myself waaay too often invoking (and furthering) the silly title of an otherwise important and meaningful phenomenon. I just don't think it is possible to stop at 2.0, and am concerned about already having seen mention of "Learning 2.5 and 3.0".
-Joel G.