I guess we'll be seeing a lot of these filters pop up in other apps now. I don't really mind, a lot of people gave shit to Instagram for being a billion-dollar-app which made photos look worse, but I think I prefer fake-shitty than the weirdly-sharp digital look that most cell phones produce.
Anyway, bravo, and that's for releasing this as free software!
I think open-source obj-C has a long way to go, and I want to help as much as I can.
As for "fake-shitty" I assure you, these are not shitty, nor are they meant to be straight copies. Check out this high res version of the output http://i.imgur.com/0OncO.jpg
Instagram is more than some photo filters.
For now you can just sign up on the homepage (http://www.backspac.es) and we'll let you know when we're good to go. Should be any day hopefully!
happy to chat more on the emails, twitter etc, cheers!