Sony is king when it comes to advertisement for its systems and its games. That is why the PS2 is as successful as it is. That is also why there are so many developers making games for its systems (console or otherwise). People will buy a popular system with popular games. This is also a factor in the PSP's future.

You can't deny that Sony won't at least TRY to advertise it like crazy. This is something Nintendo needs to counter, with at least more system advertising and more game advertising. If Nintendo can successfully market the DS and at least a few of its great games, then the PSP might not be as big as a success as it feels right now (that it might be). Nintendo needs to reach out to the "casual gamers" as well as the "hardcore gamers" in order to continue its dominance of the handheld market. More teenage and up advertisement is crucial as well.

But I don't care. Come March 24th, I'll have both systems. So I need not complain. :P