the timesheet module for phobos has been released. Even though it's in early stage development, most features are already available. It actually is the attempt to port the PAZE for OpenOffice from Uwe Schoeler to a Web-Based interface, by adding some lacking features due to the nature of Spreadsheets, like multi-entries per day, translations and replicate existing functionality like statistics and analysis views, dedicate pront view, daily followup on work-hours etc...
For details check out the documentation section of the TimeSheet module.

Please note that the main-documentation is not yet written. As always in development, the application comes first, then the documentation.