digg / delicious URL database

I want to scrape digg / delicious - the only piece of information I'd like is the URL|category|amount of diggs / favourites. would prefer if the script would go through a proxy so it does not get banned, and save the data it finds into a mySQL database. I would then like a second script that simply checks if x domain (collected above) is available to register or not / date of expiry.