Here is a follow-up trailer to the other teaser from a few weeks ago. It contains more gameplay footage and some awesome visuals. THe video also reminds you that the official world premier of CoD: MW2 is coming May 24th (Tomorrow).
You can catch the World Premier during the NBA Eastern Conference Final on TNT tomorrow at 8:00 EST. You can also watch the premier at the Modern Warefare 2 site, [presumably] around the same time as the TNT premier.