CouchDB represents a significant paradigm shift coming from a relational SQL background. It is extremely flexible as a document store, it is ad-hoc and schema-free, and provides powerful incremental peer-based replication for distributed storage. Like all NoSQL databases, it is not intended as a panacea, nor intended as a substitute for relational databases. It is simply another available tool to evaluate based on a project needs basis.
It’s been pretty awesome getting to know CouchDB, and adding it to my tool belt for consideration on future projects. I’ll try to post more specifics as time permits.