I just hear that Sony and Amstrad wanted to develop an alliance in order to invade all the world with the new Z80 processor mounted on the last multi colored Clié.
I think it's a joke, but i'm not sure.

Yeah, groovy!
I think it is a joke too. First Amstrad is dead as a stone for a while. Then a Z80 would definitively be a bad choice for a PDA. Limited to very low frequencies, adressing very few RAM (64Kb). Plus I never heard about a CarrierChip embeding a Z80 plus a screen controler...
What would be possible is a kind of very small device, as a watch-PDA. But sony tried that already with the Pocket Station, featuring a 32x32 monochromes pixels display a sound buzzer and 6 buttons. It was running a ARM cpu and was a commercial failure.
Too bad, I would love to program my watch.

I am glad to hear they are not dead. I still investigate about the Z80 PDA rumour. Maybe there is something...

Amstrad still exist - they're making integrated wired phones / email devices for homes in the UK market. They look like something out of an old 60s scifi movie :-)

Exactly, you can go to http://www.amstrad.com/ams121101/default.shtml site where all devices and features are discribed.