Yes, now that GW have released their plastic tiles that look fairly similar to the original card tiles of Mighty Empires then they have had a minor reincarnation of the original rules. They say they're not designed to replace the new rules, but if you want then you can now download a PDF of the origin rules.
It'd be interesting to see how compatible the old rules are with the new system. Considering how the tiles are still hexes and you still get castles, wizards towers and other things to put on them then I'd have thought it would be fairly close.
Shame I don't have the time or money to get involved in a full-on campaign with the tiles :\