Integration with Facebook and Google docs
Good “Versioning” feature

Issues with Sync queue getting clogged
No Mac Support

2GB free - limited to 2 computers
No Free Trial
50GB - $9.99/mo or $99/year
50GB additions - $9.99/month or $99/year for each addition

Windows XP and Vista.  No Mac Support

Syncplicity vs. DropBox:  It is rare to find two online services that are so similar in quality and pricing.  DropBox and Syncplicity both allow automatic backup across multiple machines.  They also throw in web access to your files, file sharing, and “versioning” as added benefits.  In the end, we chose DropBox as our #1 file syncing service because of its ease of use.  Syncplicity tended to be complicated at times, however we were delighted with DropBox’s ease of use from start to finish.  So if you want to harmonize your files across multiple machines and access them from anywhere, then DropBox is our #1 recommendation.