I'm hesitant to have my web developer upgrade my site to WordPress 3. I'm using v 2.9.2. Almost every time a plug-in is updated, another plug-in stops functioning and I've spent considerable money having them fixed, and not all can be fixed; not to mention my own time checking out the site.
Isn't the old adage true: if it's not broken, don't fix it?
For now, anyway, there are much more important areas where I want to spend money improving my website.