There's no easy way to move information between instances of Clearspace right now. You could try using webservices, but that would be a lot of work. One thing you could try would be to just copy the database from the test environment into the production environment, restart the production instance, change the jiveURL system property and then delete any test content (that now lives in production) you've created.
Also, you'd have to wait ~2 weeks, but version 1.6 will include a database migration tool that gives you the ability to copy all the data you have in one database into another database (any database platform to any database platform). It's meant to upgrade a single instance from let's say, HSQLDB to MySQL but you could very well use it to migrate all your data from a test database to a production database.
Thanks for the response. If we migrate data ourselves, are there certain tables of the db schema that we could backup and restore from testing environment to production environment? We are primarily concerned with a huge list of communities and sub-communities that we have created on our testing environment.
I'm not positive that this is a complete list so if you had a DBA on staff that could audit the transactions against your database as they occur, that would be way better, but to get you started:
jiveCommunityBlog (if you've created space / community blogs)
jiveBlog (if you've created space / community blogs)