I have heard of MongoDB for some time and have read quite a few articles and attended some conference seminars about it.  I had put off using MongoDB because I could find no project that really made good use of it.  About two weeks ago I started a project that doesn't really fit into the relational database mold.  I finally had the perfect excuse to devote the time and effort to learning all about MongoDB and take my place among the ranks of developers using NoSQL (whatever that means).