As much as I'd like to have spears in the game, it just doesn't seem to be enough skills left for us to use spears with. 18 skills remember? Still, I votes Yes. As in Yes.
That would only be a problem if they need to have spears as a seperate skill, and since as I understand it, they're now using two handed and one handed to divide between melee weapon skills and using perks to allow players to further specialize in specific weapon types, adding in spears shouldn't require more skills. They could just fall under two handed (Or one handed if one handed spears exist as well.) and have a spear perk in the game that does... I'm not sure what would be an appropriate bonus for a spear perk.
But yes, spears should be in the game. First, it really makes no sense not to have them in the setting, plus, having them would give players another option for combat, and aren't options something we want? Unfortunately, if they're not already in the game, I doubt posting here that we want them will change Bethesda's mind on the matter. Of course, I could be wrong here, and maybe even if we don't see them in Skyrim, we could get them in the next game, at least, though that will be a long time to wait.