Free, unlimited installation and compatibility support has been made available for all worldwide customers using Windows Vista SP1 until March 18, 2009. Telephone support is available worldwide. Chat and Email support is available in US and Canada only. Why mention this on a SharePoint blog?? Well, if you are having any compatibility issues with Vista and SharePoint, now is your chance to call up the vendor (Microsoft that is) and talk it out for FREE!
Here is the link for more information:
http://support.microsoft.com/common/international.aspx?rdpath=1&prid=11274&gprid=500921
Source: SharePoint Solutions Blog