I created a DasBlog Content filter for creating Wikipedia links. DasBlog Content filters are simple search and replace items. It does stuff like replace ; -) with <img alt="; -)" src="smilies/wink.gif"> (I inserted a space after ; so it would not get performed) It can also do RegEx patterns as used in this example.
I created a derivative of their Google search that searches Wikipedia instead. The Find Pattern is
This allows you to type $ w(Microsoft) and it will create Microsoft.
(I inserted a space after $ so it would not get performed)
The imbedded HTML is:
Multi Word with spaces works great too. If you want it to go to a page it must be exact and unique.