MySQL replication

I am planning out a solution using master-slave replication, possibly with Pressflow 7, and wanted to do a reality check that the approach makes sense. I'd greatly appreciate your feedback, even though my use case is not particularly high performance.

My client uses a browser-based application to do data collection in remote locations. These 'satellites' have web access about once a week. Currently, they are dumping a SQL file, emailing it, and manually updating the master server. Ideally, the master and all slaves will be kept up to date with the complete DB as much as possible.

I am using MAMP and Acquia Dev Desktop Control Panel to manage and create websites locally (for clients).

We are establishing a new workflow/methodology in terms of how we launch our websites once they are completed. We would like to build everything locally, while synchronizing data on a hosting account (i.e. HostMonster.com, etc) if possible. How do we do that? (with the recommended workflow) Therefore, we can essentially launch everything on one command.

My question, that hopefully somebody can answer, what is the best way to accomplish this?