We're migrating development to Vista 64 bit mainly so we can leverage >4GB memory on the dev PCs. IIS 7 looks pretty different to the flavour we've come to know and love on Windows XP Pro so we're looking at buying some reference materials.
Would buying a book on IIS 7 targetted primarily to Windows 2008 be also applicable to the version installed on Vista?
Mostly yes. Take a look here
Overview of IIS 7.0 differences Across Windows Vista Editions and Windows Server 2008 Editions