For some reason, I don't think it's the same bag. The material looks different, and the Prada doesn't have those little coin/button/somethings on the corners as her bag does.
I'm pretty sure it's PRADA but if it's not the basketweave pattern then it has to be the 'bubbly' one. Here is a pic of a 'bubbly' leather clutch which had been selling at Saks. This does look very similiar, IMO. http://bagcraze.blogspot.com/2008/11/prada-nappa-e-clutch.html
the bag is gorgeous, whatever it is. my mom asked me to find out what it was for her! i agree with babydoll though, none of the bags posted have those same little gold things on the corners.
I think it a Fendi maybe Bubble Chef or in that same line. Either is is old and no longer available or is not out yet. That is all I can figure. It is driving me crazy not being able to find it!!