Can anyione tell me how I can create a drag and drop interface like on the bbc
homepage:

www.bbc.co.uk

I'd love to add something similar to my homepage, and allow users to
personalize content they see.

Thanks

Bumping for answers.

Does anyone know the technology used to do this? How do you save the
customized layout once someone has changed it? Could you save it to a ?

I'm refering to the customised div layouts as seen on myspace, facebook, yahoo
and bbc.

Thanks in advance