The application allows Mac users to send document and eBook files directly to Amazon's Kindle eReader, without needing to hook them up to your computer over a cabled connection. You simply need drag the file you want to transfer onto the icon in the Mac dock.
The documents are then sent into the cloud and archived, ready to be downloaded via Wi-Fi or over select Kindle's 3G connections.
If you're using a 3G-enabled Kindle and are looking to send larger files without incurring digital delivery costs from Amazon, it's best to set up the application with the "free.kindle" email address associated with your eReader.
To use Send to Kindle for Macs you'll need to be running OS X Snow Leopard (v10.6) or Mac OS X Lion (v10.7). You can grab the app by clicking here.
PC users can also use the application, which has been available on Windows since January.