I got this out a few days ago, and in response to the other reviewer it works on XP and on Vista (I have installed it on both).
The game really is great, you have to look after everything in your city from power to waste disposal (a new feature over SS2000), there are the usual natural diasters and comical ones (UFO attack etc). These can be pretty anoying but you can turn them off if you dont want your city destroyed.
My favourite thing in SS3000 is the building editor, it allows you to create your own buildings from a tiny cafe style thing to massive skyscrapers of your own design, whatever you can think of it can by built.
This is the UK edition which is just Sim City 3000 Ultimate/worldwide with the addition of UK architecture, but it still contains the European, Asian and American styles of the Ultimate/Worlwide edition.
Overall a great game and will keep you entertained for hours as you build your own city