Claims on MSNBC of a droppping casualty count for US soldiers are responded to by Juan Cole with this:
It is only late October and already more US troops were killed in Iraq in 2007 than in all of 2006. Indeed, 2007 will almost certainly hold the record for the year of the most US military deaths since the war began.
According to the Iraq Casualties Site, these are the yearly numbers of death of US military personnel in Iraq:
Year US Deaths
2007 832 (by October )