petehall - 11:41 am on Mar 30, 2012 (gmt 0)
If you're automatically generating pages with a loop, it would be a good idea as I'm pretty sure Google is not keen on iteration patterns of this nature.
Of course this will be no use if your content doesn't change on each page.
If each page is independent and static, you'd be better off writing a 'unique' description for each page as then you can control what the user sees in SERPs.
Hope this helps.