Office hours is your chance to come and ask the experts questions about MongoDB or the other services we provide.
For example if you want to know how to scale (http://docs.mongodb.org/manual/core/sharding-introduction/) a production MongoDB deployment, or how to use the aggregation framework (http://docs.mongodb.org/manual/core/aggregation/), or the new geospatial (http://docs.mongodb.org/manual/release-notes/2.4/#new-geospatial-indexes-with-geojson-and-improved-spherical-geometry) features and text search (http://docs.mongodb.org/manual/core/text-search/) features in MongoDB 2.4 - come and ask us!
Of you have any questions about the MongoDB drivers (http://docs.mongodb.org/ecosystem/drivers/)
If you just want to know more about what MongoDB is and difference between other databases - then feel free to swing by, grab a coffee or a beer and come ask a friendly MongoDB expert your questions.
10gen Dublin Team