Desura is a software distribution platform (much like Steam) from the makers of ModDB.
It allows for one-click installation of MB and other mods, and will automatically keep you up to date with the latest releases. Desura will also make their achievements API and other cloud data storage available for mods. We might add some optional integration in the future.
Desura is still in limited beta currently, but they aim to go public in late-March/early-April.
We plan to continue our zip file releases, but we will encourage Windows users to switch to Desura, as distribution through them will be easier on all of us.
In case you were wondering, I've also been contacting Steam at regular intervals ever since JKA got released there. I've never gotten a response. I would jump through giant rings of fire to get on Steam, but I can't if they won't even talk to us.