Actually, with twitter :

* from anywhere to twitter :

you can post things that come from many sources (the sources are the services that the project is able to handle) through your twitter account.

* from twitter to anywhere else :

you can track a hashtag or account or both and the result of that "search" will be posted where you want (the limit of "where" is the limit of the services that the project can handle), you can even build a RSS Feed, a thing that exist at the beginning of twitter but dropped later ;)

Hope this can help ;)