MongoDB to capture JSON price ticks for real-time data

Any decent real-time data platform needs to capture ticks with full fidelity.  Typically that is done using specialised databases such as kdb+
For a specific project I am evaluating MongoDB.  There's an interesting post by AquaQ on combining kdb+ and mongodb...

This gives MongoDB, Express, Node.js and Smoothie.js.  I am not sure that "MENS" will catch on in the same way as MEAN...

See also
Smoothie charts within a node.js platform,
KDB+ (free 32bit edition)
Market data terminals, past, present and future…Killing MongoDB on OS X in a bash script