[Radiant] Changing page title

[Glenn Gillen]

Hey guys,

I'm trying to put the final touches on those extensions I promised  
last weekend, one last thing that is frustrating me is how to create  
my own PageType and have it dynamically alter the page title. Much  
like ArchivePage changes the title to be "Archives for August 2007".  
I've tried defining all manner of instance local variables in the  
render method of my Page, without success.

Ideas?

Glenn