Kandalu Software has introduced DropCloud (http://www.kandalu.net/products/dropcloud/) for Mac OS X. It offers a way of syncing files across Macs configured with iCloud.
To use you drag and drop your data files into the Drop Window and your files are available on all your devices. DropCloud is capable of syncing files across Macs configured with iCloud with its “Mac to Mac” function.
Files supported include: iWork (Pages, Numbers, Keynote), Microsoft (Word, Excel, PowerPoint), GoodReader for iPhone and Instacast.
DropCloud requires Mac OS X 10.7.2. One or more iWork applications (Pages, Numbers, Keynote) must be installed on your Mac to enable support to iCloud Documents. For “Drop” and “Mac to Mac” functionality, one or more iWork application (Pages, Numbers, Keynote) must be installed on your devices to enable support to iCloud Documents. With only “Drop” functionality, Documents & Data are enabled on iCloud Preferences (Mac and Devices).
DropCloud costs US$4.99. A demo is available for download.