I'm considering making an app on Google App Engine, to help an existing not-so-large (1000s) community with some field specific collaboration on existing projects. On single project work several people, mostly discussing things. App should communicate with "back-end" which can be hosted somewhere no problem.
But I'm not looking for another "pros and cons" discussion (for example you can read such here: Pros & Cons of Google App Engine ) but rather I'd like to hear about other people experiences in similar situations.
Any personal experiences willing to share? Ideas?