I've been a bit under the weather the past couple of days so I'm gonna take this opportunity to do a little "sponsoring" and offer a shout out to Adobe. If you still haven't made up your mind whether or not you need to take the plunge and upgrade to CS4, you might as well bite the bullet and go for it!
At the ministry where I spend my days we JUST upgraded to CS3 about 6 months ago, but I plan to have my girls go ahead with the smaller version jump to CS4 as soon as possible. We have to face it, Adobe OWNS desktop publishing. As designers, if we want to stay "in-the-know" we are going to have to stay as up-to-date as possible!