The 2007 Journal Citation Reports were added to Web of Knowledge on 18th June.
A series of free Web Ex online training sessions are available in June and July specifically for JCR, further information at: http://scientific.thomson.com/support/training/webtraining/#JCR
TIP: The quickest way to get to Journal Citation Reports from the library homepage is to click on Databases and then use the Search Database Titles box (under Locate and Search a Specific Database) to search for JCR. A search for Journal Citation Reports will of course work too, or a even search for impact factors (we try to second-guess you!).
Remember, you can create your own list of favourite databases, see http://www.liv.ac.uk/library/electron/erdatabase_help_my.html