Using GCSQL as application backend

Hi,

I've written an application that's storing some transactional data in Google Cloud SQL

I'm wondering whether this is going to become an issue when I run into DB size and pricing restrictions?

Is the GCSQL intended -only- for reporting and limited unscalable operations, or is it feasible to use it as the sole backend for an application?

Just wondering whether I should port everything to the datastore and what the intentions of the project are

Loving the cloud SQL so far by the way, makes it so easy to utilise the appengine infrastructure whilst making use of existing Java and relational DB skills