Zuckerberg told Inside Facebook:
Zynga [makers of Mafia Wars and Farmville] has had to download user information 100 million times per day because of our policy. Developers were having to architect entire systems just to do this. There aren’t any other changes in the policies on how developers can use the data,
Coming soon after their announcement that some pieces of your personal information will never be private even if you set your profile to private, it’s becoming clearer and clearer that Facebook won’t let a little thing like respect for its users get in the way of its quest for total internet domination. And why should it? Most users won’t hear about the changes, or care.
Facebook Removing 24 Hour Caching Policy on User Data for Developers [Inside Facebook]
Facebook Crushes Privacy with Impunity [Valleywag]