Corrections:
Gravel Rat, Mustang is the second-oldest SSL manufacturer after Bobcat. From there, it may actually be NH then Case... but I'm not positive on that.
Deutz engines were used on all 800-series long-wheelbase machines (863, 873, 883). The 963 was Perkins. Deutz also makes larger (>150 HP) engines, so I'd be very surprised if Bobcat bought the entire line. Personally, I think Bobcat needs to decide on an engine and stick with it. Right now, with Kubota, you can get an entire line of skid steers with one engine. That's great for service. Just when Bobcat seemed to settle in (after debating Kubota, Peugeot, Deutz, and Perkins) on Kubota, they want to get rid of it... arg! (No current Bobcats run Deutz engines.)
At the same time, I wonder if Bobcat will get rid of the transverse-mounted engine... it may be hard to find another company with offerings in the 2L category (that isn't already a competitor to Bobcat), so maybe the engines will go in longitudally now? Hmm...
And I'm getting a little flustered with the number of manufacturers in the SSL industry... there are at least three more in Europe, in addition to
Bobcat, Case, Cat, Deere, JCB, Komatsu, [now Kubota], Gehl, Mustang, Takeuchi, Hyundai, Daewoo, NH, Thomas, and Volvo... granted the Thomas and Hyundai are one in the same, and Daewoo and JCB hardly have any market share, but that's a ton of manufacturers to keep track of. If I had to buy a skid steer in three years, I'd go insane trying to figure out which one is the best for me...