And here's another reply I received today.
Topic: Can two L1's or Compacts produce stereo?

Posted Thu October 22 2009 11:18 AM
I've done it with two L1's and a Kurzweil PC2X. The stereo image was strong onstage because I was sitting between the L1's. Off stage the stereo image was far less pronounced, but very effective compared to a conventional system.

With a conventional system, if an audience member sits to the far left they can't hear the far right speaker very well, and they only hear half of the audio info. Two L1's do far better, as the closer of the L1's doesn't drown out the far L1, and the far L1 (not being as directional) has a better chance of being heard at an odd angle.

Sitting further back in the audience is very pleasing even though the stereo effect may be lost at the back of the room.

So, two L1's will be heaven for you and overkill for someone else.

That being said, I use two L1's whenever possible.

Cameron Hizer