gsync is a java tool you can use to save your files in your google drive. This tool provide :

• recursive copying (like unix rsync)
• upload of big files which could be stopped and resumed later (tested with very huge file : ~3 Go) .
• two modes : command line OR with a very simple GUI (Graphical user interface).

See howto page for more details : http://code.google.com/p/gsync/wiki/Howto

This tool makes google drive available to linux users !

A special thanks to the project JProfiler http://www.ej-technologies.com/products/jprofiler/overview.html which tool help me to debug my soft.