Godfather, Scarface, Splinter Cell: Double Agent, Prince of Persia, Blazing Angels, Resident Evil 4, are all good ports of PS2 games and Godfather, Scarface and RE4 in particular are great with motion controls.
If you want something uniquely Wii
Dewy's Adventure, Kororinpa Marble Mania (or the superior and much longer Marble Saga sequel), Elebits, Opoona (RPG), Mecury Meltdown or of course the classic Zack and Wiki
Also unmentioned so far: Rayman's Rabid Rabbids was fun and Red Steel while flawed is still one of the only Wii games with split-screen local multiplayer on FPS which I had a lot of fun with and the game was fun (although the sword fighting becomes progressively less fun...)