Seeing a lot more over here too. I Shot past a white English reg S1 last weekend, saw the driver turn to the side and gawp at me with that 'OMG another one actually exists!' look, just as I was doing with him! We were both doing about mach 1 though, so far too fast to do any flashing of lights etc.
A couple of days later I was just leaving the work carpark and passed a green S1 estate, and same thing, the driver and I exchanged brief looks of disbelief for an instant while passing. Funny, it was at the exact same place on the road where I first saw my grey S1 (which I now own).
Then SWMBO went for a job interview the other day, and what should she roll up beside (while driving my green S2), but a silver S2 XM... one that I'd seen around the roads for the past few years, and recognised the numberplate of, but it had eluded me for some time lately... now I know where it lives...well works.. Hah!
I'm seeing more of them about than ever. There was a real drought of them over here for 3 or 4 years, glad to see them out and about now.
Bet they're still more exclusive than Ferraris mind you!
Ciarán