Using Rails to push/pull data from Google App Engine


I am planning to use Ruby on Rails to push and pull data from Google App

So this the scenario
Ruby on Rails (on hosting site) <-> internet (push/pull) <-> python in
Google App Engine.

Do you think it is good idea? or I am duplicating work on both site? One
of the reason I want to do it this way, because the data in Google App
Engine will be access by other site not only from Ruby on Rails. Ruby on
Rails hosting site do more complex stuff, others site only pull or push
simple data.

Am I making sense?

Thank you in advance,