If it's a marketing position, why isn't it in the the marketing org? I don't work for Mich Matthews who runs marketing.
All evangelism is marketing. It's not Marketing (Mich's division), but it's marketing, ie:
"Marketing means to make a communication about a product or service a purpose of which is to encourage recipients of the communication to purchase or use the product or service"
Alternate definitions include "promoting a product, service or viewpoint".
Evangelism is really all about increasing visibility, increasing adoption and increasing community.
Which is all marketing.
And if your job isn't marketing, why is it that everything you do is marketing (Channel 9, interviews, blogging, conference speaking, plugging developers in with the right people, making connections, encouraging internal people to be more blog and customer
If it wasn't marketing, why is every TE job on MS Careers under the category "Marketing"?