This forum is filled with spoiled rotten little brats. Don't like what he's charging for it, don't buy it. It's pretty simple. I'll buy it as soon as it's released. You can go buy some other Twitter app. If you bought Tweetie at $2.99 already, and then you bought some other app, most of which are $4.99, you've already "wasted" more money than you would have had you just bought the new app. And really, Tweetie hasn't needed a bunch of major updates, because to me, for what I use it for, its still the best one out there WITHOUT numerous updates.
And to the person saying you don't waste your money and you value a buck, blah blah blah, oh stop. I've got plenty of money myself, none of which came from "mommy and daddy." I buy mac products and I am a frequent customer of the App Store. It's not making me go broke. And I did terrible in economics when I went to school, but even I can tell you that if you think me buying things is BAD for the economy, then you probably should have paid a little more attention in that class.
But in the end it's pretty easy. Don't like it, don't buy it. I buy new versions of software all the time, for a lot more money than $2.99. I suppose if you have Adobe Creative Suite, you feel you're obligated to receive CS2, CS3, CS4 for free too. It's the self-righteous, I deserve everything, you deserve nothing, me, me, me people that are destroying our economy, not the people buying a $2.99 app. Think before you speak...or type.