In terms of strength, we'll add the UCI protocol to be able to run games against other engines. We'll see how it performs but we don't expect to beat Stockfish easily, even with a very large number of nodes. That will be part of the experiment and we'll be happy to publish the results.
Now, another path to get real performance would be to find a way of using webGL on the workers. Folding@home has proven it's sometimes 10x more efficient than using CPUs. If we can manage to do that then we might have a shot at being both the largest and strongest AI...