Sony Computer Entertainment America is on track to accomplish their goal of six million PlayStation Portable units shipped to retailers in North America by the end of the year.

Back in October, SCEA boss Kaz Hirai predicted that the firm would reach six million units by the start of 2006; at that point, Sony had recently announced hitting 4.47 million units shipped in North America, as part of 10 million units shipped worldwide.

Speaking to Reuters this week, Sony spokesperson Molly Smith said that "we're mapping to that forecast... We're very comfortable with where we are," but did not clarify what, exactly, the forecast called for.