
Actually, Apple have a pretty long history of designing their own in-house chips. And very good they were too, working with VLSI on application specific ICs (ASICs) throught the 80s and 90s.
Admittedly, this has pretty much fallen by the wayside with the availability of cheap general purpose chips; but even as late as the 90s Apple were designing custom SCSI, audi, and graphics chips.
When Acorn spun off ARM (Acorn RISC Machine, a nice recursive acronym there!), Apple and VLSI were a couple of the original investors.
And anyway, the reason Apple bought PA Semi is exactly because designing new ICs is 'insanely difficult'. Apple got all the insanely clever employees of PA Semi too. And they *can* design a chipset!
While I agree that HTC don't design any chips, maybe you ought to take another look at Sony. Aside from a bunch of custome ASICs for their home electronics divisions, Sony (along with Toshiba and IBM) where responsible for designing the Cell chip. You may have heard of that...
Paris, 'cos she likes mayo with her chips...