It's pretty easy using a scraper, it depends on what you want to use the friends for really though.
I've made a few tools for FB in CURL, scraping FB is easydo you know of any good scraper software?
There's some good tools for myspace as well that do this. You can scrape all the data from ms accounts. I did 200,000 music fans into city state and country and then created 70 accounts and added 400/day on each by location. It's not a bad method, though myspace isn't what it was 3 years ago - it still works.