Carbonite has announced two flat rate small-biz plans.
The new plans are dubbed Carbonite Business and Carbonite Business Premier and have no limits on the number of computers backed up.
The Business plan is $229 /yr for 250 GB of storage and backs up Windows and MacOS machines and attached hard drives. The Business Premier plan is $599/yr for 500 GB of storage and adds Windows Server backup (Windows Server 2003 and higher).
Additional storage for both plans is 50 GB for $46/year or 100 GB for $89/year.
Sign up for a free 30-day trial or get more info at Carbonite.