After implementing scores of sites with blogs, trying core Joomla articles, then ZOO Blog, we find that EasyBlog really does a great job of offering what most site owners have come to expect with a blog tool. It is especially useful for multiple bloggers on a site and for conversions that include WordPress blogs. The WP blog migration works beautifully.
Best of all, though, is the support at Stack Ideas. They truly strive to meet the needs of their customers and are the best we've experienced in the Joomla world!