Tweet as long as you like. Never be bounded by 140 characters limit.
Tweet longer than 140 characters limit on Twitter.
*How does this work?*
When you tweet a message that is longer than 140 characters, it will automatically get truncated and a link to the original full-length tweet is appended at the end of the message.
*How is this different from other similar services?*
I'm glad you ask. The great thing about this is that you don't have to go to another website to compose and post your tweets. You can do everything right on Twitter.com, as you'd normally do.
The more important advantage is that all shortened tweets are automatically expanded on Twitter, so you can read and browse other people's tweet like normal.
In other words, once you install this, everything just automagically works right on Twitter.
Give it a try and let me know if you have any feedback or comments.