I reinstalled my Linux box with RedHat 7.2 and used the ext3 journaling file system. This thing is a pig now. There isn't much running on the box, and performance is sad.
I use ext2 and love it.... no plans to move to ext3... seems like it has a lot of overhead that I don't need (since my ext2 filesystems don't crash...) Perhaps if you are in an environment where someone powers down a server (all the time) without doing a proper shutdown, ext3 is worth the overhead?