Frogger you know, and Dance Dance Revolution and Silent Hill look like fairly faithful (if a little tweaked) recreations of the dancing and horror games that both series are known for. Metal Gear Solid Touch seems the most interesting title -- that series seems to reinvent itself almost every time it reaches a new platform. There have been strategy versions, card-based versions, squad-based versions, and even the old 2D games, so though all we know is that MGS Touch has eight levels and will use the touchscreen, from there Konami could do anything they can think of.
Great to see that a historic publisher is investing heavily in the App Store, though. If these games turn out to do well, we could see some other big-time developers follow suit.