Fried matza ("Matza Brei") - If you break the pieces so they're smaller than a kezayis, then the bracha may be mezonos. You can make a mezonos if it is deep-fried or cooked in water, but it might be hamotzi if its is just fried with a small amount of oil. (see http://www.torah.org/advanced/weekly-halacha/5770/tzav.html)
Chicken soup with crushed matza ("Matza Farfel") - If the (small pieces of) matza are cooked in the soup, it will be mezonos, but otherwise its hamotzi.
Matza Pizza - Hamotzi.
I think (so please correct me if I'm wrong & CYLOR):
Matza is considered regular bread, and the same brucha rules apply. For cooked bread, the brucha is Hamotzi if the pieces are larger than a kezayit. If the pieces are smaller than a kezayit the brucha is mezonot. (Brochos 37a)
Matza meal is matza ground up way past a kezayit, so Keneidels get a Mezonot, and I think Farfel would too. Matza Brei, and Pizza are both larger than a kezayit, and both get a Hamotzi.
As far as I recall (Gemara in Berachos, and other Hilchos Berachos), the general rule is if it has צורה דנהמא (form of bread) still recognizable in the cooked product, then the beracha is hamotzi.
I can't think of any reason why Matzo pizza would NOT also be hamotzi (if it is a piece of matzo with sauce and cheese). I think even if the matzo was ground into meal, and reworked into a crust, would it would probably still qualify as hamotzi.
Chicken soup with Matzo farfel would be mezonos, since if no longer has the form of bread.