Thanks Dave,

So, I'm pretty sure I know what you mean here but just in case, I googled (ok live searched) for an example.  Hard to believe (ok, not that hard) but I found myself asking the same question about 18 months ago.  Arg.  Brain freeze is the only excuse.  So, I decided best to blog the answer and maybe I'll remember it longer this time.

Thanks again for the tip.

http://peterkellner.net/2008/05/25/codecampwebsiteseries3/