Hi, I just started using IntelliJ IDEA 10 and so far am loving it. I had a little trouble getting debugging for PHP working correctly so once I figured it out I wrote up a little guide for it. If anyone else has trouble getting it working, check this out: http://savagelook.com/blog/portfolio/php-debugging-on-intellij-idea-10-with-xdebug
Hope it helps. Thanks for the great product.