http://nextbigfuture.com/2014/01/dwa...-computer.html

Right now, we [Dwave Systems] have a 1000 qubit processor in our lab. Dwave has a plan to release it later in 2014. The major thing that's changing aside from some of the design details is the scale of the problem you can represent, going from a 500-variable graph to a 1000-variable graph. Complexity of that is growing tremendously. [It leads to an] unimaginable exponential blowup of the number of solutions. That scale of problems is getting that much harder for classical algorithms to solve.

[After that] we're planning to release a 2000-bit processor design. That's pushing into a scale of territory where we're tackling problems that are very difficult for people to solve [with conventional methods]. The community is working on getting a few qubits to work at the scale they're trying to work at.
Interesting stuff, far out of my league in terms of understanding the magic behind the math behind it.