What do you expect from a lightweight Twitter client?

Today I'll give a first peek on my current project. Is it.. is.. uhm.. is it really a twitter client? Yeah, it is. Despite the fact that there are dozens of twitter clients out there I really wanted to make my own one. That's not because I think I can do it better (Twhirl is great!) but I wasn't able to find a good and free client for my Mac.

TweetDeck is too big in my opinion. Twitter is just a short messaging service, microblogging. So I expect the client to be as micro as the purpose of the service. Don't get me wrong, TweetDeck is great but just too big for me. Then we have Twhirl which is absolutely great and which is my default client on every system. BUT: running on my Mac (iBook G4) with two accounts active my fans immidiately start to blow. mooter (name to be defined ) should be a lightweight client for multiple accounts. A final design on how to manage seperate accounts is not yet ready. But I'm thinking of an intuitive way of combining the timelines of multiple accounts in one.

So these were the main reasons on why I started developing yet another twitter client. One reason though is: I just wanted to do something with the twitter API and see how it works. Additonally this is also an interesting approach for me on developing nice and interactive AIR desktop applications.

So, here's a first shot of my current version, showing the timeline and a notification bubble. Not much yet but tweeting and displaying the default timeline already works fine Even with automatic linking of hashtags, usernames and URLs.

And so here's my question: what do you really expect from a sleek and lightweight twitter client? Share your thoughts!