From the last 10Q:
On August 12, 2010 the company declared a stock dividend of 19 (nineteen) additional common shares for each common share owned as of the record date. This dividend brought the issued and outstanding shares to 888,000,000
My assumption is that those extra 843,600,000 will be restricted for about a year. I don't know that for sure, though... haven't done much research on it yet.