My Wii is still at my parents' house in Durham, actually. I didn't take it down with me to university, and since I moved straight from university into my own house, I didn't really think to bring it back down to London with me. I'll probably bring it down eventually - or I might just get a Wii U in London and leave the Wii for my mum to play Wii Fit or something...
My DS and iPhone, on the other hand, I can play whenever. Indeed, I normally play one of the games on my phone every day, be it Fruit Ninja or Sudoku or Tetris or something. The DS gets less usage over all, but there'll be times when I just get the sudden urger to play Mario Kart DS or Elite Beat Agents and I'm glad that the DS is always right by my bedside table.