Syncbox is an HTTP synchronization host for Factsmith v1.1 and up. Synchronization allows you to share and collaborate on briefs by using an online repository instead of everyone having their own individual copies. Instead of manually emailing updates to your partner or clubmates, you can just click a button and instantly have the latest versions of everything.
Registration is free, and you can store as many files as you want (individual briefs are limited to 1 MB, about 400 pages.)
For greater flexibility, Factsmith can also synchronize via FTP, or to a personal syncbox server. For details, see the documentation on internet synchronization. Syncbox is open-source; you can download the code here.