At Wikimania I presented what we are doing to bring real time Semantic Support to Wikipedia. The URL in my presentation is no longer valid, the new location is at: wikipedia.wikitestsite.org.
You will find a dump of the English Wikipedia and you many of the expressions that we already now are in green. We are working towards a situation where new concepts defined in OmegaWiki will be recognised in the future data mining of the same article.
What we are discussing at the moment is adding functionality to the concepts found. Some are obvious like giving the definition, giving an option to go to OmegaWiki when the definition does not fit, showing translations for the expression in the language that is of interest to the reader.
We can imagine that there is more functionality that you would consider useful. Please let us know .. :)