The bane of all that is fair and decent in Web publishing. Okay, maybe that's a little harsh but Microsoft's plan to insert these so-called smart tags (which link to Microsoft sponsored sites) into any page that you browse or any document that you publish would be quite detrimental to authors and editors because it basically modifies your document without the permission of the source.
There are plans to have this included as a "feature" on Windows XP but the public furor over it may cause Microsoft to have second thoughts.
It's an interesting spin on how we include hard links on our WUs here on E2...except that the author would have no control over the links being added.