We're (slowly) rolling out a second generation backups system to all customers. That system allows you to directly move data from test to production, accp, whatever. It's also a lot faster and supports larger datasets. The only caveat is that you currently can't upload backups to restore.
If you'd like to move to the next system earlier you can file a ticket for this.
Rochus,
On the backup tab under deploy there is the option to upload a database. Then use the uploaded database for your restore.