Is it possible to purchase an hosted version of Clearpsace (very usefull to do mock-ups)?
Yes, if you contact our sales team they can set you up with an evaluation site and you can also choose to host with us if you want to purchase Clearspace.
Is there a way to import content into Clearspace in xml format?
You can use web services to import content:
Where can I find language packs for Clearspace (French, German, ...)?
I don't believe we have language packs for French and German yet: currently we support English and Spanish.
By saying you support ClearspaceX in Spanish does that mean you have a version already translated for Spanish speaking community use? Can this be used within the same community as English speakers, with the users being able to choose which language interface they see when they login?