How do I prevent Ubuntu One from syncing all my CouchDB databases?

You can limit which databases Ubuntu One synchronizes with the Ubuntu One servers by setting a new key "excluded_names" in the management database within the ubuntu_one_pair_record document. To do this using Futon, you would:

1. Open http://localhost:PORT/_utils/database.html?management/_design/ubuntu_one_pair_record
2. Create a new field named excluded_names
3. Set "excluded_names" to a JSON list of the databases you DON'T want synchronized with the Ubuntu One servers (e.g. ["db1", "db2", "db3"])
4. Click "Save Document"