There are many ways to sync your files between two computers, but new service called SugarSync lets you sync files between computers and your smartphone! The SugarSync service has 3 separate clients - one for your desktop, one for the web, and one for your smartphone. SugarSync securely backs up all your computers online and synchronizes them automatically so you always have access to your files. This syncing runs in the background, so you never have to make backups or email files to yourself. The service is currently in beta, so you'll need sign up for an invite on their homepage.