SugarSync is now available for BlackBerry and you can try the free BETA trial now. Currently, they only support BlackBerry software version 4.2 and newer.
To get the application and your free trial, go here.
SugarSync for Blackberry features:
1. Remote file access and editing: Retrieve, edit and upload files stored on other computers and the Internet (including Microsoft Office docs, music, videos, and more). Note: May require a Blackberry document editor.*
2. On-demand synchronization: SugarSync will detect any file changes and present the opportunity to upload revisions back to the cloud (and to multiple synced computers).
3. Shared Folders: Send files and folders (large and small) to anyone via an email sent directly from the Blackberry, and collaborate on projects through a Web-based Shared Folder (which can sync back to the Blackberry).
4. Powerful Photo Features: Easy browsing with a thumbnail wall display of photo albums, enjoy detail with high resolution photo viewing, and directly upload and sync photos taken with the integrated Blackberry camera.
*Note: Mobile file editing is currently limited to certain file types. Supported files may require a separate document editor shipping only on newer versions of the Blackberry devices.