ABOUT

Data storage: googledatastore
Indexing server: google app engine
Communication protocol between Index Server and Client: XMPP by Google app engine

Decided to use SleekXMPP. Due to this, mydropbox only work with python 2.6+ (SleekXMPP is an XMPP library written for Python 3.1+ (with 2.6 compatibility).)

Requires boto-2.0b4 

INSTALL:
For MAC / MacFSEvents 0.2.1
http://pypi.python.org/pypi/MacFSEvents
For Linux / Pyinotify
http://pyinotify.sourceforge.net/

#REFERENCE:
http://code.google.com/p/boto/wiki/BotoConfig
http://pypi.python.org/pypi/MacFSEvents
http://pyinotify.sourceforge.net/
http://googleappsdeveloper.blogspot.com/2010/03/resumable-upload-for-google-data-apis.html
http://code.google.com/apis/storage/docs/gspythonlibrary.html
https://github.com/fritzy/SleekXMPP/wiki