(above image by Gret Curtis, CC-BY)
Leif Percifield was asking about the possibility of an iPad app to view balloon images and even do a little stitching in the field just as images come down off a balloon. Even if this isn't the final stitch, it's nice to run through the process with such immediacy.
Hearing this, i remembered that at Science Hack Day in San Francisco last year, some grassroots mappers did actually make an iPad app. I wasn't sure it actually allowed stitching but here's the relevant info:
The blog post about the event and the app: http://blog.edenisawesomeawwwwyeah.com/2010/11/15/grassroots-mapping-at-science-hack-day-sf-2010/ The source code: https://github.com/trevyn/HeliumView