Other places to be built on seven hills include:

Edinburgh (Calton Hill, Castle Hill, Corstorphine Hill, Craiglochart Hill, Braid Hill, Blackford Hill, and Arthur's Seat)http://www.edinburghscience.co.uk/aboutedinburgh.htm

and Sheffield with its seven hills, carved by six rivers, trying to shed the image given in the film "The Full Monty"
http://www.shef.ac.uk/uni/academic/A-C/biblst/prospectiveundergraduates/livinginshef.html

New to me is Worcester, Massachusetts but I expect that there are others out there. There also seem to be a lot of places called "Seven Hills".