I've been on the Stack Overflow for a couple of weeks. If you've been under a rock and don't know, Stack Overflow is a Q+A website for programmers, developed as a joint venture between industry luminaries Jeff Atwood and Joel Spolsky.
From the questions that fellow developers have asked, it highlights that a lot of people are doing a lot of vastly different things. Everything from tracing the inner exception of a soap message in ASP.NET through to rendering a tree structure in Django through to wondering the performance implications of case insensitivity in Regular Expressions.
This is why I love software development. There are so many fields to get into, and so many languages to learn and so many ways to do the same thing. If you get stale, you can just learn a new language or technology in your current language.
So my question is - is there any other industry that is as diverse?