My latest project :)
So you want to use your iPhone to control your MongoDB?
It's possible with MongoFly MongoDB client for iPad and iPhone.
Now available at the AppStore.
With MongoFly it's possible to:
Browse, add, edit or delete databases, collections and documents.
Drill-down the json document hierarchy and add, edit and delete nodes within a document.
Search through documents with full text search or with json.
See for MongoFly.nl more information.