I've been trying to figure out how to get my Twitter updates away from a computer, without having them come to me as annoying and continuous text messages.
I already figured out that you can send a text message directly to Twitter by typing 21212 in the "To:" field, which is cool on it's own, but might not work for people who pay for text messaging.
Then I thought, maybe I can access the Twitter home page from my smart phone's browser, and Bob's your uncle, there it was. There is a standard view and a mobile view, and i find that the latter much faster and more compact for my Palm Treo.
By the way, if you use FireFox I found a neat little extension called TwitterBar, which lets you comment and post to Twitter right from Firefox's address bar. Pretty cool!