I’m in the middle of switching hosting providers. One problem is that when you do this and your host changes, you have to clear your DNS Cache (this is what maps names like tongfamily.com to IP address like 69.206.2.3). On Windows, there is a command line, _ipconfig /flush_ that you run. On Mac OS X, there is a similar but Unix command, _dscacheutil -flushcache_ as pointed out by http://www.inertramblings.com/2004/05/11/mac-os-x-clearing-dns-cache/