Picasa Web integration takes shape in Chrome OS
There's always been a small dropdown icon to the right of filenames -- in all honesty the only option I recall being there before was to delete the file. That menu has now been expanded from its original form to now include options for uploading to your Picasa Web albums, Flickr account, or to send via email (though only the Picasa option is active at this time).
Other files don't have the updated context menu yet, but don't be surprised if uploading office files to Google Docs and videos to YouTube become options in the very near future. I'll be sharing more screenshots when they do.