Yep, I thought the grey looked nice - and the Ebony is very smart.
Serif, essentially Mazda bring out a number of special editions on the MX5 - usually in distinct colours, different seat leather, and special tweaks - for example the Venture has integrated sat-nav. The Special Editions usually sell for around about the same price as the normal models, but the added goodies make them attractive. I fancy the Venture as it has the built in Sony TomTom sat-nav, although it loses the BOSE stereo fitted as standard to the 2.0.
Some owners swear by the extra exclusivity a special edition brings - you certainly see fewer of them on the roads, but I guess it's just a matter of personal taste. I understand there will be another soon - the Kuro - try googling it. Looks good too.
Recent special editions have been the Senshu (Germany), Kendo (UK), Niseko (UK), ZSport (UK), but the list is many. Hard enough to find though - to buy new you need to be changing your car as the special edition you want is released I guess....