I heard a rumor that Citrix will soon acquire Orbital Data so that they can have a WAN optimization solution in their portfolio.  We'll see if it comes true.

Orbital's claim to fame is good performance in very lossy networks.  I'm happy to report that our WANJet recently way outperformed them in a scenario where a 40% packet loss scenario was the benchmark! And WANJet does lots of other things too.