I am forced (we-won't-pay-you-if-you-don't, not we-will-cause-you-unbelievable-pain-if-you-don't... errr, actually maybe both) to work with a team of devout Microsoft 'developers' (I think in this case the term 'application specialist' is more appropriate though still generous).
Without exception, every conversation I've ever had with any of them (computer-related, anyway) has concluded with no real progress in convinving them that Microsoft is not the be-all and end-all of software development (they only 'develop' in Visual FoxPro... draw your own conclusions).
However, a couple of weeks ago, after about a year of subtle pushing the open-source methodology, one of the more devout MS fans in my office, out of the blue, started asking about Linux and in particular open source databases (I use PostgreSQL for best all-round performance and functionality).
Naturally, I had a set of RedHat CD's at the ready for such an occasion, and quickly printed out a set of instructions on how he could set up his system with dual boot NT/Linux (slow and steady wins the race).
Over the last couple of weeks I've spent a bit of time with him helping him with his new OS and with how to get it to work with his legacy OS.
Now he's hooked. He has several Linux books (I offered last week to lend him some of mine, but he'd already bought two!) and is preaching the virtues of open-source software to the rest of his team after his successes with Linux.
I had a word with him today about what it was he liked about Linux (this would apply to any open-source OS), and it was the fact that all the tools you need are there, on the CD. You don't need to buy anything else. He's had a few problems getting it set up properly, but with a little help (from the books, and from me) he's now got a working system for free that does everything a $1500 MS system (and then per-client and per-processor licences) would do. And it doesn't crash.
So now I'm feeling good. If every one of us can convert a devout MS supporter to the path of righteousness, and even only half of those go on to do the same it will not be long before the momentum is such that not even MS can survive!
Go forth and multiply...!