Did you have to keep your WP blog in offline mode, but generally “Page Cannot Be Found” is what would greet them.Now you can show a custom splash screen to your visitors with a timer to tell how long the site is down. User can customize their own splash screen or get a list of splash screen from author’s site.
Install the plugin as any other plugin, to put your WP blog in Offline Mode just goto Setting –> Offline Mode Settings –> Check “Enable Offline Mode” and select a splash screen, If feel it would an even greater plugin if we could upload our own images to be used in the splash screens.
The plugin is Compatible up to: 2.6.3 and works with WP 2.3.1 or higher.
Offline Mode Plugin : Download