Just thought I'd come back and offer some additional impressions... I had a NYKO ZERO for about a week. Overall I like the feel of it better than the DS3 by quite a significant margin. Unfortunately, build quality leaves a bit to be desired. It occasionally lost connectivity with the PS3 and I had to get up and press the sync button on the dongle to get it re-acquire a connection. The battery charge last all of a handful of hours or so. I was even willing to accept that (though it says 25 in the manual). Also, the rumble never worked even thought it said it had rumble on the box. I've read reports of rumble not being in the early versions of the Zero. Maybe I got an "early" one. I didn't like that at all as that was a reason for paying the bigger price tag. Finally, the O button started freaking out so back it went...
I bought a second DS3 even though I dislike the controller quite a bit. At least I know it will work. ONE BIG COMPLAINT: Who's cheap-ass idea was it to ship a DS3 without a fucking usb cable? How cheap can Sony get at this point? I was pissed at not getting any kind of HD cable in the box with my $500 console. However, a USB cable, that probably cost less than .25 cents in bulk? Way to piss off a customer. "Hey, Mr. New Car Buyer: You know your new car doesn't come with a remote to open the door, right? Yeah, they're cheap, I know, but you'll need one or you can't get in it to drive it..." Sheesh.
I hate trolls.

Systems I currently own: 360, PS3, Wii, DS Lite (2)
Systems I've owned: PS2, PS1, Dreamcast, Saturn, 3DO, Genesis, Gamecube, N64, SNES, NES, GBA, GB, C64, Amiga, Atari 2600 and 5200, Sega Game Gear, Vectrex, Intellivision, Pong. Yes, Pong.