Simple! Use the dataset and share your code. We will be happy to put it on this website. You can also share this website using the buttons on the right menu.
Then, put the list of songs you use (defined, for example, by their Echo Nest ID) on your website when you publish something. With a simple list of IDs in a text file, it is very easy to recreate a test set in a few minutes, allowing others to make precise comparisons against your algorithm.
Finally, talk to other researchers about using larger datasets. The GZTAN genre collection was amazingly useful, but we need to move on.