Aug 11, 2010 09:21 GMT  ·  By

Twitter is continuing to move into areas covered by third-party developers so far. The microblogging service is said to be working on its own official “Tweet button” to be launched sometime this month, perhaps as early as this week.

The Tweet button will come in several shapes and sizes and should be easily embedded by using just a snippet of code. The move will affect Tweetmeme, a startup which provides a very popular tweet button, the most.

Mashable managed to get its hands on some papers describing the new button. These papers are intended for publishers which have been testing the new button secretly. According to the tech blog, the official Tweet button could be launched as soon as tomorrow.

The Tweet button comes in three sizes, two of them with a counter indicating how many times the link has been shared on Twitter. The three options should cover most situations and should enable most websites to fit the new button without messing with their overall design too much.

The button can be embedded on any blog or site using just “1 line of code that ‘just works’,” Twitter says in the confidential papers. Twitter uses an iframe snippet for this.

Twitter is not saying anything about the new button just yet. The feature is mostly complete and is already working, meaning that you can embed the code on your site and the button will show up. However, most users won’t be able to retweet a link with it just yet.

It should be interesting to see how this affects the other players in the market. Twitter has been making some aggressive moves lately striking at the heart of its development community that greatly helped it become what it is today.

It has started releasing its own mobile apps, either by acquiring existing app-makers or by building its own. It has also started using its own URL shortener on the site despite having used Bit.ly for more than a year.