Tweeting from outlook using OutTwit works like a charm, but I was missing something to soothe my Mobile twitter attacks.
This is when I discovered Twikini and PocketTwit for Windows Mobile. I tried PocketTwit first, but could not get it to connect to twitter on my HTC P4350.
So after uninstalling it I tried Twikini. Twikini looks like a million dollars in all of it's simplicity.

It is compatible with all Windows Mobile® 5 and 6 devices, including touch and non-touch.
I'm already hooked on this app. Hope you will enjoy it too.