First Look video: SugarSync file-syncing
For serious syncers who routinely work from multiple computers or mobile phones, SugarSync is, in more ways than one, a premium solution to file-transferring problems. More flexible than some competing PC-to-PC syncing software or mobile and PC remote access services, Sugar Sync weaves in elements of both. Lite sync some folders for online back-up and fully sync folders or files to load them on each of your computers. A change to one file exacts a change to all.
SugarSync doesn't do everything, and the mobile functionality could use some usability finessing. There are also a few tricks worth knowing to ease your way. Here's a good one--if you're not interested in transferring every icon or EXE to all hooked-in computers, before syncing your Desktop folder, either move the elements you do want to a different folder and bypass the Desktop sync, or throw everything into a new folder on your desktop and exclude it from the syncing.
SugarSync managers are available for Windows, Mac, BlackBerry, Windows Mobile, and iPhone. A free trial of the service is available for 45 days. SugarSync premium storage prices can be found here.
Jessica Dolcourt reviews the latest and greatest smartphone apps, in addition to a healthy dose of Windows software. E-mail Jessica and follow her on Twitter. 
From the website:
mTools is a suite of mobile tools inclusive of mHome, mShare, and mSync with more tools on the way. mTools is meant to provide you with easy management of your mobile life and enable you to transfer files from mobile device to mobile device.
mTools Consumer Benefits
1. Manage your mobile life effectively
2. Send large files to friends and co-workers from your mobile phone
3. Mass distribute files, media, and contacts from your mobile phone
4. New mobile platform for file transfer
5. Have a safe place to backup and store your mobile device files