The Devices page on n-gage.com still lists support for N93, N93i and N73 as "coming soon", but there is now also this little blurb at the bottom of the page:
NOTE: Nokia reserves the right to alter the actual devices supported and the product features at any time.
That wasn't there earlier. Seems like they are preparing to say that these phones won't be getting N-gage. Morally speaking though, saying that now is too late. They should have said it before we bought those phones. So they're now still obligated to give us N-gage support, or somehow compensate the affected phone owners in my view.