FE Hoppy has a point, you are either going to use the IPAD as a EFB or a PED, in the case of the EFB the use must be approved by your authorities, in the case of a PED, it must be off for takeoff / landing just like in the passenger cabin.
I just purchased a knee strap and an external GPS antenna for the IPAD2 in order to improve the location functions in the Jeppesen FD APP, it's an excellent tool for use inflight, but we are lucky that our local authorities are not living in the dark ages
Mutt