Hi Slawa, thank you for your interest in developing around Wikipedia and MediaWiki!

On 12/23/2012 03:33 PM, S. P. wrote:

I'm a developer of http://wikify.appointment.at/ - a web service to enrich any text with links to Wikipedia article. This is just a JavaScript experiment of mine, but friends keep asking me why this feature is not available in Wikipedia/MediaWiki itself.

You might want to ask/propose directly at the discussion page of the Wikify project:

http://en.wikipedia.org/wiki/Wikipedia:WikiProject_Wikify

Apparently there was automatic wikification in the early days, but it was removed:

http://en.wikipedia.org/wiki/Wikipedia:PHP_script_automatic_wikification

If you want to offer this feature to other MediaWiki based sites, then a first step would be to offer it as an extension:

https://www.mediawiki.org/wiki/How_to_become_a_MediaWiki_hacker

So here I'm just making sure MediaWiki developers are aware of the idea/function. I'm sure you can do it better than me, but let me know if I can help you in any way.

I hope these links are useful for getting your idea closer to the people that potentially could use it and/or could help you improving it.