SP1 is available for any edition of Windows 7.
Yes, you can.
You can install Windows 7 including SP1. To only install Service Packs you will need the base operative-system.
Yes, as long as they are the same edition.
windows 7 ultimate
It is Windows 7.
windows xp
No, Microsoft only supports Windows XP SP2 and SP3, Windows 2000 SP4, Windows Server 2003 SP1 and SP2, and Windows Vista.
As of this date, there are no windows 7 service packs. Microsoft released SP1 on Feb. 22, 2011. It can be installed through Windows Update, or it can be downloaded from the related link
No.
Windows 7 is currently the latest version of Microsoft Windows. There is a Windows 7 SP1, which includes fixes to things in the original shipping version of Windows 7, but there is not a newer Windows 8, for instance. Microsoft is currently working on Windows 8, but no release date is set as of this writing.
Well, you will either need to buy the professional edition of windows 7, or use a torrent site to get it.
The only operating systems that run "SimCity Societies" include: Windows Vista Home Edition, Windows Vista Professional, Windows Vista Media Center Edition, Windows 7 Home Premium, Windows 7 Home Edition, Windows 7 Professional, Windows 7 Ultimate, Windows 8 Home Edition, Windows 8 Home Premium, Windows 8 Professional, Windows & Ultimate, and last but not least the: Mac OS X Snow Leopard.