the letters from....

[heidi.h.tandy.c92 at alumni.upenn.edu]

No: HPFGUIDX 13039

Warner Brothers, in this case...

They've got the picture of Harry & the dursleys in a hailstorm of 
letters at 
http://harrypotter.warnerbros.com/web/dailyprophet/article.jsp?
id=Exclusive+Letter+Photo - I feel confident in saying that this is 
one picture which will be staying up there for a while.
But remember - you can use the picture as your computer's desktop 
background, pursuant to the WB site's terms & conditions ("Any 
authorization to copy Material granted by WB Online in any part of 
this Site for any reason is restricted to making a single copy for 
non-commercial, personal, entertainment use on a single computer 
only, and is subject to your keeping intact all copyright and other 
proprietary notices.") but you can't use the picture on any other web 
site or networked computer environment.