Hi Shadowhunter,
I've grappled with this question as well in the past. I have members of my family who are not in the LDS church and others who are. Those who are not in the LDS church feel that it is blasphemy to say there is more than one God, but there are numerous occasions in the scriptures that show there is more than one God. For example, in Genesis it says "let us make man in our image."
A talk by an LDS General Authority, Jeffery R Holland gave a very good talk that has helped me with learning about the nature of God and why it is important. Here's a site with the talk "The Grandeur of God"
Favorite General Conference Talks by Mormon Prophets Grace for Grace