I've got Appleworks 6 running on my OS X machine, and I just did a very large mail merge with it not too long ago. If you've got high speed internet access, you can buy it from Apple and download it immediately. There are some bugs, though. It crashes when I try to make a new presentation and no other presentations are open, and there was some dialog box that doesn't do anything. Other than those, it seems to work well.
I've attached a screenshot if you want to see it in action.