I was viewing the source of the BBC home page the other day to poke around how they chose to implement various bells and whistles you find there.
Looking at the home page source (not the external files) there is a huge amount of whitespace sat in there not doing much other than adding to the already impressive size.
As an experiment I stuck the entire source code from the BBC home page into an html packer which removes any unneeded tabs, spaces and new lines and the results were pretty shocking.
The file size dropped from 80k to 52k. Thats a compression ratio of 0.649.
Almost a 35% saving for dropping all the whitespace. Go on BBC, you know you want to.