Meme its a micro blogging site of yahoo as you know(may be) but The site was has been available Portuguese and Spanish now this site available in English language also.You can go to the site and read what it says in English, but it’s not available for actual use at this point. You can give them your email address in the “I want in” field, and presumably you’ll be updated when it does become available for your use. WebProNews Blog Partner Daniel Threlfall recently described the service:

Meme users will find the main Meme page to exhibit many of Twitter’s standard features. Users create a name and can follow other users and gain followers, much like Twitter. They can also share photos, videos (currently only via YouTube), and music, in addition to sharing text updates (limited to 140 characters.).

A feature unique to Meme that many believe will enhance its popularity is the “repost” button, which appears next to every feed. Other users can click the repost button and the story will appear in their own feed (similar to Facebook’s friend feed in their most recent update), which is required for commenting on a story. Meme also contains a sidebar indicator that displays how many times a story has been reposted. The repost feature adds a dimension to networking potential that could be particularly useful in viral marketing.

you can feel all there feature at http://meme.yahoo.com/home/