How can I publish via RapidWeaver?

Answer:
How can I publish a RapidWeaver website using RapidWeaver's built-in publication features?:

After registering a domain and purchasing one of our hosting plans you will receive a "Welcome E-mail" containing your account information. Information is listed as the following example:

Server: yourdomain.com
User Name: ftp username
Password: ftp password
Site Path: /www

Open your RapidWeaver document. Click File, Publishing Settings.

Enter the information in the Publishing Settings dialogue box in the fields that correspond to the information in your welcome email.

Save.

To publish for the first time use the Republish All Files option.