Does your library or office use Vista? Microsoft just announced the upcoming prebeta launch of its new OS, the laconically named "Windows 7". 7 refers to the fact that this is the seventh release of Windows (although others differ). Release should be late 2009, early 2010. So you still have time to get used to Vista.
As for my own place of employment, we haven't switch to Vista yet. Just switching to Office 2007 was traumatic enough for some. If money is available, the users of the new computers bought this year will have the option of retrofitting to XP if desired.