central repository of changelogs for debian packages?

[Kurt Lieber <debian@kirpatrick.com>]

I'm running unstable and am trying to balance the constant flow of updates 
with conserviing bandwidth.  Typically, I do an apt-get update once a week 
and see what packages have been changed. 

Is there a way to easily and quickly tell what has changed from debian 
package to debian package? (i.e. short of downloading the source of each 
package and reading the changelog.)  

I'm looking for something like the packages search page on debian.org, but 
that also includes changelogs for debian-specific revisions. (such as going 
from xserver-xfree86 4.1.0-9 to 4.1.0-10)  Does such a beast exist?

--kurt