In Dragon 305 (March 2003) there is an article called "Faith and Honor - Piety for Non-Clerics". In this there is a feat called "Divine Channeler", which allows you to turn or rebuke undead once per day as a cleric half your character level. To take this feat you must have a parton deity and you must already have the feat "God Touched", from the same article. This feat gives you a +1 luck bonus once a day to one die roll, if the action deals with something in relation to the gods portfolios.
So this is a semi-official way to take Divine Might with a sorceror, but I'm not sure it's worth it. You must spend two feats to be able to select Divine Might.