Okay, here is the big challenge that Sony and the PSP have to fight. Most people think that the PSP's only challenge is the DS, but they are WRONG! The N-Gage can also get rid of a couple of dollars for Sony. Sony first has to fight off the GBA and GBASP, and IF, a very big IF, it can surpass the GBA and GBASP(Which I HIGHLY DOUBT will happen), MARK MY WORDS, THE PSP WILL NEVER GET PAST THE DS, EVEN IF IT GETS PAST THE GBA AND GBASP!!!!!!!!! Don't believe me about the GBA part? Read the article on this site:
http://ds.ign.com/articles/577/577553p1.html