In his account of a massive power grid failure, Duncan Watts writes:

"The trouble with systems like the power grid is that they are built up of many components whose individual behavior is reasonable well understood but whose collective behavior, like that of football crowds and stock market investors, can be sometimes orderly and somtimes chaotic, confusing, and even destructive." – Six Degrees, Duncan Watts

I believe there are similarities between power grids and web service networks that could result in catastrophic cascades of unplanned collective behaviors.  We need to understand the problems better and build safety mechanisms in and around each nodes and, most importantly, key web service nodes such as those that bridges web service network clusters.  Web service orchestration problems are just the tip of the iceberg.  Who can claim to fully understand the problems of echos, oscillations, cascades, and bottlenecks inherent in a large network of web services?