I think Microsoft is still Sendo's main target. Interestingly, several observers have said that they think Sendo "lost" its battle with Orange - I don't see this at all.

I think that what we don't know is what's important here! - and what we don't know is this: "Who gave Sendo's designs to Texas Instruments?"

If the IP that Sendo is licensing to TI is, indeed, the patent that is the subject of the Microsoft lawsuit (we can't be certain, can we?) then did Microsoft give the designs to TI? or did HTC get the design from Microsoft, and then commission TI?

If it is Microsoft who gave the design to TI, then the lawsuit will be pretty quick - providing TI comes forth with evidence. If it went via HTC, it could be harder to prove; but again, HTC would really have to offer some kind of explanation of how it got the idea.

Where Sendo would be lost, would be if it turned out that TI built a chip for HTC based on the design that Sendo gave it for the Z100. In that case, Microsoft is in the clear.