A five-way directional pad? How would that work? which one would you use for up? Does having five directions add something to the features about the phone? Either way, it looks really really nice!
Hehe going back to my design and tech classes I remember they said you have to keep in mind that users have to feel a familiarity to it.
From looking at yours I think it looks like any normal mobile phone which is good. The keypad shape is different but if it functions like people expect then you've created a good design.
I like it although my favourite phones are the flip open kind. Like Motorola Razor (Not V2 as they suck “donkey balls”.)