I searched and searched through the Selenium documentation but could not find a list of the supported browsers and their start commands. So I ran off in a huff and downloaded the source to find the list that way and voila :

From – trunk\server-coreless\src\main\java\org\openqa\selenium\server\browserlaunchers\BrowserLauncherFactory.java#47

• firefoxproxy = FirefoxCustomProfileLauncher
• firefox = FirefoxLauncher
• chrome = FirefoxChromeLauncher
• firefoxchrome = FirefoxChromeLauncher
• firefox2 = Firefox2Launcher
• firefox3 = Firefox3Launcher
• iexploreproxy = InternetExplorerCustomProxyLauncher
• safari = SafariLauncher
• safariproxy = SafariCustomProfileLauncher
• iehta = HTABrowserLauncher
• iexplore = InternetExplorerLauncher
• opera = OperaCustomProfileLauncher
• piiexplore = ProxyInjectionInternetExplorerCustomProxyLauncher
• pifirefox = ProxyInjectionFirefoxCustomProfileLauncher
• // DGF pisafari isn’t working yet
• //pisafari = ProxyInjectionSafariCustomProfileLauncher
• konqueror = KonquerorLauncher
• mock = MockBrowserLauncher
• googlechrome = GoogleChromeLauncher

Enjoy