Google currently has a problem affecting Syncdocs:
"We're aware of a problem with Google Docs List affecting a majority of users. The affected users are unable to access Google Docs List. We will provide an update by September 8, 2011 8:40:00 AM UTC+11 detailing when we expect to resolve the problem.
Please note that this resolution time is an estimate and may change.
If you have links to individual documents (excluding Google Documents and Drawings) you can access them directly. For Spreadsheets you can: 1. Go to http://docs.google.com/spreadsheet/ccc?new to create a temp spreadsheet 2. Go to File -> Open to get a list of your spreadsheets"