Every once in a while when I lived in London (Ontario) I used to see a motorized bike, and there was at least one motorized skateboard as well (I saw that one several times over the years with different riders/owners) but was never able to talk to the riders about them.  Usually we were going opposite directions etc.  When I was younger I rode my bike everywhere, any time of year.  Killed a few, built a few FrankenBikes out of the parts, rode them until the road salt and seasons caused them to come apart too.
My wife and I moved out to Vancouver a little over four years ago, and have seen a few MABs around.  There are a lot of shops around the lower mainland that sell e-bikes and convertion kits, but they never appealed to me.  The electric front wheel kits looked okay, but on closer inspection seemed a little flimsy for my bike.  I like to (ab)use the beast a little on off-road trails as it was built for sometimes and the replacement rim just didn't inspire confidence, so I never went that route.
I'm lucky in one way; since I moved here my place of work has actually moved closer to my house, I can almost see it across the river from my porch.  When that happened I started biking to work again.  I used the bus a lot too (still do when I have to) but it only loops around the area I work in for a couple of hours at each end of the workday.  Stay for O/T, walk home.  A guy I was working with told me about 6 months ago about a friend who'd motorized, so I bugged him until he texted his friend to find out where he got the motor.  That's when I found out about 
ZoomBicycles, and that they were close enough for me to pick up instead of paying shipping.  I have a car now, but I survived pretty well without one for our first two and a half years here.  The car only goes out when we need the carrying space for groceries etc, or when the MAB is being a b*tch in the morning and it's too late for me to get to a bus that would get me there on time.  Of course, the car burns more gas in one day than the bike does in a week, and I get to be stuck for 40 minutes in traffic at the end of the day, instead of home in 15 minutes (or usually less) on the bike.
So, I bought the kit, spent a little time last summer putting it on 
my bike.  That lead to meeting some of the neighbours, both are vintage Mustang owners, one a (semi) retired master mechanic who happens to have his own mini-shop in his garage.  Acety torch, MIG welder, and many more interesting items, plus a lot of experience.  After watching me work on it and test ride it he went out and got a kit for his wife's bike.  She was a bit too nervous about it I think, so I paid him for the kit and set it up on a used 
bike my wife bought.  
Since then I've picked up a stack of five kits, though one has been sacrificed as a parts motor, and have a couple of 
other bikes in the garage waiting for me to have time to work on them.  I've been collecting parts and things they'll need as I go, now it's just a matter of having enough hours together at once to do something useful.