Not being funny but Sony Computer Entertainment and Sony Ericsson are two completely different parts of the company. If the Xperia Play turned out to be terrible there is no way PlayStation would lend their name to it, the fact that they have at least shows that more than one Sony department has faith in the phone.
SE Play is the most excellent phone of all time, among all gsm phones, including apple, nokia, and all the others
that will only make these phones more expensive! Considering the play is targeted to a much younger market than the other two