Websharing File/Media Sync is a great app allows you to sync the Xoom with your PC or laptop, and establish your Xoom as a file/media server on wireless network.
With the WebDAV Server feature, you can access your Xoom from your PC's browser. I often transfers files, music, photos, and videos over Wi-Fi between my Xoom tablet and computer. My document fully synchronized between my Xoom and XP Laptop. Useful for browsing and file transfer.
Download Websharing File/Media Sync ($2.99) from Android market.