web77, I honestly don't know if you'll be able to take the domains with you or not. I don't offer free domains with hosting packages for this very reason: my clients and I both know that the domain is theirs, even if registered through my company, since they paid an extra charge for it.

If you're the registrant, you potentially have a stronger case for taking the domains with you. I would search your current provider's forums, search the internet, search their FAQs to see if they say anything about taking your domains with you. Then, if you can't find anything, figure out which registrar is being used. Contact the registrar directly and ask them about their domain transfer policies when someone else administers the domain for you. That way, if your provider does decide to try and hold your domain "hostage", you'll know what steps to take to get it back. (You'll also want to take screenshots of your whois information to show that the domain does indeed list you as the registrant.)

Good luck..!