Regarding the new ScriptDb service; from the frequently asked questions section:
What are the quotas on the database? Currently, the are: 50MB for consumer accounts, 100MB for Google Apps accounts, 200MB for Google Apps for Business/Education/Government accounts
This limit is per-user across all their databases.
Taking the consumer account as an example, does this mean there is a 50MB quota for each database owned by a user, or does the quota apply to all of a user's databases combined?