I'd still hesitate to say that it's easy to get one or that you won't have to get to a store early to get one, either, but I think the days of camping out and waking up at insane hours of the day to get one are over.
I recently got one two Sundays ago when TRU got their huge shipment in. I got there one hour before official store opening (which is at 10 AM) and was #68 out of 80 consoles. They were letting people in way early (I would imagine around 8 AM based on the fact that there weren't 67 people in front of me and people were already walking out with Wiis) so at least if you decide to get to a store very early, you will be assured one and you could presumably get back home earlier. But anyway, that's besides the point. There was also a BB right next to the TRU I went to that opened at 11 AM and there were only about 6 people in line and they were only guaranteed 12 units, if I remember correctly. Of course, by the time I got back in my car with my Wii from TRU at around 10:40 AM, the BB line had at least 12 people, which doesn't take into account people who might've stopped by just to find out there weren't any left.
SO, to make a long story short, I think if you really want to guarantee one for yourself, you shouldn't take the attitude that you don't have to at least get to a store a little bit early. I've been to many stores on many different days since I got mine and I haven't been lucky enough to see any sitting on shelves.