I made an Ur-priest Duskblade, as an 11th level build for fun. It involved the use of the Flexable Mind feat to get bluff and diplomacy as class skills. As far as I can tell on paper it's a rather potent build, and as was said before channeling Harm is always very fun.
My Deviantart, Please enjoy it. Invincible Maiden Avatar by GryffonDurime.