i mean a real one... desura sucks ass, mine won't even update FF...
2 mods that do it are coh mods but i bet its possible to do for a source game as well. to my knowledge you just hook the download up to website so it just acquires it from your website. you could ask how
these guys did it and see if its possible to do here. having one will greatly improve the mod as a whole as you can update it more. the one on desura really doesn't count plus it leaves you relying (desura, and) on everyone to use desura and for me it doesn't even work so i can't use it. coming up with an auto updater i think is a huge step towards this mods independence from steam to me a vital step if were ever gonna get past steamworks.
i would say after 2.5 released start looking into an auto updater so you can get patches out quicker. it would go along way towards keeping the game afloat.