Noticed when trying to build a query that only equals and not equals is supported. It is possible to implement this using JohnnyHK's answer from this post:

http://stackoverflow.com/questions/7811163/in-mongo-db-how-do-i-find-documents-where-array-size-is-greater-than-1

// Find all docs that have at least a second name array element.
db.accommodations.find({'name.1': {$exists: true}})