I'm a little disappointed, but not really surprised. I'm starting to seriously consider getting one of the 70-200's and have been leaning towards different ones depending on the day of the week. The 2.8 IS II is way too overpriced for my mainly hobbyist budget, so I've been looking at around the $1g mark. That leaves three options: the f4 at $650, the f4 IS at ~1000, and the f2.8 at ~1000. I tend to lean away from the f4 since I really want IS at that aperture, but have had a hard time deciding between the f4 IS or the f2.8.
At the same price, it's tough to decide between a 3-stop IS system (steady shots at slower shutter), or a 1-stop faster aperture (faster moving subjects)
With the f2.8 being discontinued, that pretty much makes up my mind for me. Now to find the money....