Yahoo Inc. has launched an invitation-only microblogging service named Meme which appears to be its answer to Twitter.The Sunnyvale company (Nasdaq: YHOO) previously offered Yahoo Meme only in Spanish or Portuguese but is apparently ready to try it out on the English-speaking world.

After filling out an invitation request, users can fill their microblog with an avatar and short description as well as enter text, images, videos and music and share it with their friends. They can then search other Meme users' public accounts, have their entries appear in your stream and repost others' entries, much like Twitter.