It's a pretty cool extension! Altho the way you handle new tweets (or replies for that matter) is too slow in loading. Is there no other way than to load in a remote webpage on ostrichapp.com to get the new message window?
Here's why: I figured any malicious site owner could add some javascript code to submit the form with any text they want. Therefore any website could tweet something in your name. This is really bad, so I took this approach instead.