Might explain why there isn't one already. The benefit to Twitter is much more apparent. Helping them out might eat into Facebook's revenue. If Twitter can find

Might explain why there isn't one already. The benefit to Twitter is much more apparent. Helping them out might eat into Facebook's revenue. If Twitter can find some common ground with Facebook or if some 3rd party can, such a service would be possible. Would be interested to discuss if such a situation is likely.