Take photos with iPhone.
Edit photos with VSCO Cam app.
Create diptych with TurboCollage app.
Resize diptych with Photogene2.
Write post in Blogger app.
Upload diptych to Flickr via Flickr app.
Log in to Flickr's non-mobile site to copy photo url info.
Paste photo url info into Blogger app.
Cross fingers.
Publish.