We just released a new feature (again - and thanks to Memento Mori): Public Presets.
You can now publish, comment, rate, and even copy (if you have the cards) Presets with the other players!
The listing page is there:
To publish, go to your Collection, load the preset you want and use the link "Make my current Deck public" to publish your own presets.
Presets are deleted when people vote them down. Fraggle addressed this already..........