Then again, Islam advocates taqiyya which, according to their insane religion, is acceptable lying for the advancement of Islam.
Unfortunately for us Christians, the REAL God commands us to not bear false witness.
Here's an interesting discussion.
http://atheism.about.com/od/tencommandments/a/commandment09.htm
My own view is that there are situations where lying is not only acceptable, but possibly mandatory. The main thing being that no innocent party be hurt.
For instance, untrue gossip, maybe gossip in general, for who can say what is true, would be wrong. On the other hand, telling the armed robber that that was all the cash you had would be permissible.
anyway, that's my opinion, and some day I'll answer to God as to whether I was right or wrong.