I just thought I would pop in and let you know there are other ways to post to Twitter. You can download Twirl or TweetDeck to you computer. I don't have the http handy, but if you do a search, you'll find it.
The great thing about these two programs is that it stores the tweets you miss since you last had it open. Makes it easy to catch up. You also can Twitter and leave the webpage, working on something else.