We do all clustering and no mirroring at work. This is for 2000 OLTP systems, 2005 OLTP and AS clusters.
Most of our issues tie back to the San which we don't have control of. We have had some ongoing failures that seem to occur when we are running full text index processes on one of the 2000 clusters.
We are in an active/passive configuration everywhere and while it is probably the most costly from the hardware perspective, we have the most comfort in the case that something fails.
This could be a great meeting in the future.