This game just came out this week and dunno if its worth to buy or not.. its like $39.99 and you can make your songs and beats in the game too.

::Short Description::
Traxxpad is an application that promises to transform Sony's PSP into a powerful piece of professional music studio equipment. Traxxpad blends the power of sequencers, drum machines, and keyboards, allowing anyone to create, mix and sample their own tracks at home or on-the-go.