No standard for mini HDMI?!?

The Cable that comes with the Atrix 4G is called a "mini HDMI" but yet when you go to monoprice.com and search for mini hdmi some other cable shows.

Did Motorola create their own connection for the mini hdmi spec?!?

HDMI Cable, Home Theater Accessories, HDMI Products, Cables, Adapters, Video/Audio Switch, Networking, USB, Firewire, Printer Toner, and more!

I believe you're looking for an HDMI A to HDMI D cable. Got one for my X for 3 bucks on Amazon. HDMI D seems to be the official spec name for the port.
 
Assuming it's the same cable as the X, you can also look for "Micro HDMI" cables.
 
Assuming it's the same cable as the X, you can also look for "Micro HDMI" cables.

It's the exact same cable.. even on the Atrix it's called mini-HDMI.

of course, searching for micro hdmi gives you the correct one.