Posty

If you are still deciding which microblogging service suit your needs better and the one that your friends us the most, you can start by using Posty, a microblogging client that allows you to send Tweets simultaneously to different services like Twitter, Jaiku, Pownce, Tumblr or FriendFeed.

By this way, for example, you can use the different accounts at the same time without having to use different programs and logging in different sites.

Write the micropost you want and choose the service where it will be posted: personal ones to Pownce, job in Twitter, links in FriendFeed,...

Finally, it's necessary to remember that Posty works on Adobe Air, so it requires it.