I remember ICQ's chat feature showed people what you were typing in realtime, typos and backspaces and all. That seems like it would've been a lot more effort to implement, and I don't know what the reasoning for it was other than to sow pure chaos. We should bring it back.
Loading seems to be taking a while.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.