I think you're right Zelos, liquid ammonia is polar, so it theoretically could support some sort of life similar in structure to ours.
This is not true with liquid methane (like on that Saturn moon they reproted had liquid methane recently).
Also, on the other side of the temperature scale, I think they feel that ionic life might be possible. Things based on ball lightning for instance. All conjecture of course... Plasmas, you see, have all sorts of interesting properties.
So some sort of life forms could theoretically evolve on certain suns in their ionosphere.