And a tip, if you're developing on a Mac. Turn on Web Sharing (under Sharing in System Preferences), then set the path Flash builds the SWF and HTML to something like "../../Sites/xxx", where xxx is the file name of each. Then you can access it in the browser using the IP address of your machine and the HTML file name, as above. No need to upload it to a separate site for network testing. It's still a local file so will work locally in the debugger or standalone Flash player just fine.