Videotron has had a "interest registration"  page for a while promising to notify you when the iPhone eventually made its way to its Quebec only network. 

Now we see these tweets

We know Videotron bought 700MHZ spectrum outside of Quebec with the hopes of expanding its services accross Canada.  We know the iPhone typically drives new subscribers to carriers so pairing it with an attractive monthly plan can be really bad news for Rogers, Bell or Telus.