That's a pretty broad request as you're not asking for specific kinds of effects - motion graphics, greenscreen, titles, in-camera? I'd start here on the COW reels section http://reels.creativecow.net/ you'll see some quality work.
I will say that the most visually arresting thing I've seen lately is an old documentary called "Man On Wire". About a crazy Frenchman who wire-walked between the twin towers of the World Trade Center, back in the 70's. Captivating narrative, imaginative camera direction and terrific editing. A little bit of motion graphics and PIP effects, but really based on mostly "the art of the cut".
It was on IFC channel a while back; I DVR'd it and only got arounf to watching it last week. Well worth your time.
Also, any time I feel I need to wake up my visual creativity, I like to look at the DVD of Michele Gondry's work, "the Director's Series". Very inspirational.