Ipad; Tokyo; boots

Mr Cloudz just bought an Ipad, yeah i can finally play my fav game on it. He was saying could prolly bring it to Tokyo to view maps etc if we got lost...wonder is there network there and how to connect in the 1st place?

And moi bought a spanking new pair of an unusual colour of boots, instead of the normal black. And was intending to wear this for the trip too!

As the trip is at the end of this week, gotta change money to Yen soon...any traveling tips/must-see/must-go/must-eat places recommendations in Tokyo? Will highly appreciate any advice since we're going free & easy for only 4 days...we'd be staying in Shinjuku.

So far, i've narrowed to other places like Ginza, Shibuya, Roppongi, Akihabara (worth going?), Asukasa for the temple (worth going?), Tsukiji Fish Market, Harajuku (worth going?), Odaiba, Ueno (worth going?). And i guess the Tokyo Tower and Rainbow bridge which im not sure how to go. Is Imperial Palace worth going?

1st time to Tokyo, hence so many qns...