As Facebook (and the rest of us) quickly found out, the whole applications system combined with the infamous Facebook feeds quickly became very spam-like in application publishers' efforts to get more users on board. The result has been a steady release of regulations being piled onto the application developers, which has had a bit of a push-pull effect in that some application creators will still seek out craft ways in which to circumvent the regulations that Facebook has laid out. This, of course, just means more regulations for Facebook to roll out.
We already heard of the "clear all" option that Facebook added last week, so you can get rid of all your invites and notifications at once. What Facebook is announcing today is a set of new options for users and regulations for app developers, most of which seem to focus on the feedback system that was installed for news feeds a few months back.
Facebook has also removed the ability for app developers to "dead-end" you in an invite loop, which I actually appreciate to a large extent. There's nothing more frustrating than having no other option than to leave the application or invite your friends (in which case I only invite one friend that doesn't care about the spam one way or another)!