All editions of Vista have IIS:
Check under Control Panel > Programs and Features > under 'Task' click the
'Turn Windows Features on or off' link from the list available then from
list of options > check off 'Internet Information Services' click OK.
As for Vista SP1:
Microsoft is always striving to improve the quality of their products.
Windows Update is one of the great examples of this effort, since its
implementation, Microsoft has continually improved the service to deliver
improved experience for Windows, software and hardware devices. Windows
Vista SP1 is currently in testing as of this writing. It is expected to be
released sometime in the first quarter of 2008.
You can apply for the beta at
http://connect.microsoft.com its not
guaranteed you will get in, its closed to the general public and is a
managed beta. If you own an MSDN Subscription you will be able to get access
to the beta at a later date.
To learn more about Windows Vista SP1, please check the following link:
http://windowsvistablog.com/blogs/w...ows-vista-service-pack-1-beta-whitepaper.aspx