Twitter Enhancements: Revisited

I just saw where twitter has a secondary application that allows you to search all of twitter for certain words so you can see what the buzz is about that word, e.g. "Palin" or "Hanna" or "Crunch-n-Munch". They even have an advanced search that really lets you narrow down your search. I think this twitter search thing could be used to give me almost every I want from my 'Searching' request.

I thought of another enhancement I'd like to see...

4. TinyURL
   
   I've noticed that sometimes when I enter a URL in a twitter update, twitter automatically uses TinyURL to shorten it. I'm not sure what is the determining factor for when they shorten it and when they don't. It's probably a length threshold.
   
   The first time I saw them do that, I was reminded of TinyURL, which I hadn't used in a really long time. Since, I have been shortening my URLs to give me more characters for the rest of my update. However, when I want to do that, I have to go to TinyURL.com, create my shortened URL and then, copy and paste it into my update.
   
   I would like to see a widget on the twitter site where I could create my shortened URL. I imagine that I would paste the the "long" URL into a field and then click a button. When I click the button, twitter would TinyURL-ify my URL, and the resulting shortened URL would be automatically be placed in my update.
   

I mentioned yesterday that I use Twitterific and in a comment Zack mentioned that he uses Twhirl.

What twitter apps do you use?