Yep.
Recently saw Mr Mubarak's A340-300 (Egypt) at EGLL; even little Johnny Howard (Australia) gets a little 737 (suits him, really).
I think the pres of Argentina has a 757.
Yep, the UK is a bit out of step.
But that issue gets debated from time to time on these boards - search under 'Blair Force One'. Wonder what they'll come up with for the new boss - 'Brown Air'?