at some point you will need to move your Magento installation. These articles help with that.

magento.stackexchange.com/questions/3058/i-cant-access-my-st...
These instructions tell you how to edit the database when you cannot access your store after moving your magento install.

support.argoworks.com/entries/249672-Magento-How-do-I-change...
Magento: How do I change my database settings?.

www.magentocommerce.com/wiki/groups/227/move_magento_to_anot...
The following article shows you what to do when you move your Magento store on the same server. This procedure is exactly the same when you move your shop to another domain or server with an additional step .
Adjust Database Configurat ...

toolboxdigital.com/2009/09/moving-a-magento-installation/
How to move a Magento installation from one server/domain to another, and deal with the problems you may experience. The following article describes the processes and steps involved to successfully move your Magento site to a new server/domain nam ...

toolboxdigital.com/2009/09/moving-a-magento-installation/
How to move a Magento installation from one server/domain to another, and deal with the problems you may experience. This is quite a good article telling you what to do.

www.denisvlasov.net/207/where-to-find-the-config-details-of-...
Developers often have to do some work related to database, such as backups, database edits, etc. But usually the clients don't even know what is MySQL database. This article tells you where the config settings are stored.