I just launched my first Twitter application called BigTweet (http://bigtweet.com) which installs as a bookmarklet. It lets you choose between a 140 or 280 char limit, include special Unicode symbols, and shorten URLs with Bit.ly while posting a tweet from any web page.

You can see more info about the technologies I used to build it by clicking the "About" tab on the BigTweet homepage.

Any feedback is sincerely appreciated. If you have the time, please also post any specific ideas to my feedback forum at bigtweet.uservoice.com

Thanks!

BlueSkies @scott_carter