That's exciting news. Looking forward to use that!
I have a much of questions:
1) is this just your own filter or can other users subscribe/browse filters.
2) Can you make your own filter public?
3) is there an API?
I'm currently in a bus, visiting parents, will likely ask more questions soon. Hype! Will implement whatever is possible when back home in Sunday and next week... This is gonna be a busy release.
1 & 2) You can make filters public which allows them to be viewed on your profile or viewed via a list of most-popular filters. These can also be subscribed to or copied into your own personal filter list.
3) Yep.