If you’re looking for a way to sync files from your network to your Android device without plugging in your sync cable, WiFi Syncr syncs to your network shares.
Install the free app on your phone, point it at your network share (open or password protected), and it will sync the files between your Android device and your computer. There’s no need to install any sort of software on the host computer. The only requirement is that the host share the folder as a Samba share (Windows shares this way by default, other operating systems and devices can be configured to do so).
WiFi Syncr is a free application, requires Android 2.1+.