Having been several months since I've tried to run django on the google app engine, I took a crack at it today with Django appengine http://www.allbuttonspressed.com/projects/djangoappengine

Since it is based on django-nonrel, in theory it does not have vendor lock in to app engine, so you could start to develop there and move in house if you need to.

I set up a very simple little app, and it deployed to appspot okay, here is the code and a short screen cast on my blog

screen cast:
http://tingletech.tumblr.com/post/2334189882/
demonstrates the django admin interface running in the google app engine editing the super basic models

The super basic models:
https://github.com/tingletech/collengine/blob/master/items/models.py

code repository: 
https://github.com/tingletech/collengine

Dose anyone know of any other django or app engine based digital library metadata collection tools?  Seems like being able to run for free on app engine (if things fit in google quotas) would be an advantage for small libraries and short term grant funded projects.  Also, the django-nonrel looks like is has some interesting search features that could be used in access systems.

Anyway, just throwing this out there in case it might be useful for the hackfest

-- Brian