Convincing others of Ruby over Python and PHP
Hmm, as an active programmer in all three languages I simply can't agree with the sentiment that either is better than the other. Sure, Python and Ruby are more object-oriented, but that's not a requirement to be better, it's only a convenience. You can't beat the community of PHP and the legacy (for good and for bad) of code, nor ignore the direction PHP is taking for the future, the mass of support, the distributed servers ready for it, and so on.
If you want to focus on syntax, then all three have their strong and weak points. If you want to talk about back-end technology, then as all three are moving active open-source projects, there really is no winner.
Except, you, the programmer, who can mix and choose what best suits you. Remember that even if you think Ruby is the best thing since NAND gates it doesn't mean others follow. And remember also that we're all different; some people actually like Java and .Net, just like others love LISP. We're all different, and I doubt any of the Ruby/Python/PHP contenders are any better than the other. Sorry.
G'day folks. I'm trying to introduce Ruby at work, and a few people are interested. However, I've been asked to present the benefits of Ruby over Python and PHP.
I've broken this down into 2 parts:
1) show Python and Ruby's advantages over PHP;
2) show Ruby's advantages over Python.
The first is easy. I'll explain things like:

Everything's an object.
Python and Ruby are easier to read and write.

For the second, I'm thinking of:

Ruby has many conveniences, which makes it easier to read and write. Eg: Optional brackets, and being able to open built-ins, allows for things like 2.days.from_now
RSpec is miles ahead of Python's TDD and BDD frameworks.
GitHub and RubyForge are fantastic resources for finding, releasing, and collaborating on software.

Do you have any suggestions? I'm all ears!