|XP is just a number|
Don't teach, nor preach. Demonstrate.
If these are "close colleagues", you'll have a very good idea of the type of tasks they regularly encounter, and those that they find most difficult to deal with.
Solve that problem with perl -- but before you take it to them; post it here and ask for improvements.
Once you've selected the best approach -- by your personal (assessment of their) criteria -- set them that task; or preferably, challenge them to solve it.
Then compare notes. Your (PM optimised) solution versus their <insert tool name> solutions.
Do it right, and you'll get some takers.
Do it twice -- with one of the early adopters providing the 'winning' solution (by their criteria not yours!) -- and you'll get lots of takers.
No marketing; deception nor sleight of hand. Just good code demonstrating its worth.
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.