Arun this is what i suggest; there may be other alternatives.
Google's Picasa has a Java API. Using that, one can access the web
albums. With LCDS or BlazeDS, the accessing java code can then be
referenced in your actionscript code or mxml page as RemoteObject.
This then serves as a dataprovider source for a TileList control,
or any other custom control you might have for the display.