Some of the software which would be supplied with the camera may not work with Vista -- but the camera should connect and allow you to transfer pictures to the computer regardless of the operating system.
I would go to local Canon website use the e-mail address there to request that they confirm that connectivity will be okay.
Thank you so much!! Here's the answer I found at Canon's site:
Windows Vista requires ZoomBrowser version 5.8 and later to install. If you camera shipped with a solutions disc that has an earlier version of the software than ZoomBrowser 5.8 please click the download link for up to date software options