I have been silently wishing that this day will come.
While I love Instagram as an app/service, I don’t use the camera function much. Hipstamatic is my go-to app when it comes to capturing photos; for its speed, stability, but mostly its spontaneous nature.
What I’d do — much later — is to post my pick to instagram (user: @w1ll) and (optionally) fed to either Tumblr, Twitter or Facebook. I’m still using the 3GS, so it isn’t the most effective use of my time waiting, it’s slow but it beats posting the photo individually to each network.
The good news is Hipstamatic had meticulously redesigned its sharing interface and baked Instagram’s API right in, so not only you can post photos directly from it, but you’ll properly get Hipstamatic-specific tagging in a nicely designed interface in its own Hipstamatic-style.
It’s just great that when two potentially competing parties can shake hands and make the world a better place for their users.
On an interview about the partnership, Instagram CEO Kevin Systrom reveals that there will be more apps to have such support built-in. I’d be thrilled to see such integration with iPhoto, or better yet, iOS, the same treatment as Vimeo had.