"Moderately interesting"? This article is a gold mine on the subject!

I'd like to read his take on idempotency in logging system, as this has always been among the harder problems to solve when designing IT architectures for me.

Edit: Here are two more papers from the author, Pat Helland.

* Building on Quicksand - more about eventual consistency - http://www-db.cs.wisc.edu/cidr/cidr2009/Paper_133.pdf

* Life beyond Distributed Transactions: an Apostate’s Opinion - http://www.cidrdb.org/cidr2007/papers/cidr07p15.pdf