Nikon MB-D11 now has a competitor ! New battery grip for Nikon D7000 from China manufacturer , Galaxy Electronics. There is no info about its price yet but i’m sure it’ll be cheaper than Nikon MB-D11 ($219)

Specs:
- Brand Name: GLX
- Dimension: 133*72*49mm
- Weight: 240g
- Standard Accessories:
- AA battery slot
- Li-ion battery slot
- Infrared remote control
- Optional Accessories:
- AA battery
- EN-EL15/EN-EL15A battery
- Compatible for: Nikon D7000
More detail onĀ GLX website
via Nikon-D7000.net
Phottix has announced battery grip for Canon EOS 60D. BG-60D can hold up to 2 LP-E6 batteries or six AA size batteries. It is also equipped with a vertical-grip shutter button, dial, AElock/FE lock button, and AF point selection button.


Comes with:
Battery Holder for six AA batteries
Battery Holder for two LP-E6 rechargeable batteries
Instruction Manual
The battery grip is available for order for $95 at Phottix online store
Also check earlier grips for Canon 60D at Amazon
The wait is over ! the PRO battery grip for Nikon D3100 now available on eBay. It can hold two EN-EL14 battery and has a vertical shutter-button for portrait mode. To connect with a shutter release accessories , a special transfer cable is also included. I’m pretty sure this is legit since the seller is Top Seller rated on eBay.. they probably won’t risk anything selling fake stuff.
Visit the ebay sales page

Features:
- Brand New Pro Battery Grip for Nikon D3100 SLR Camera
- Hold 2 EN-EL14 rechargeable Li-ion batteries.
- Vertical shutter with half-press function. More comfortable vertical shooting.
- Doubling the battery capacity of your camera, effectively extend your shooting time.
- Significantly improves stability.
- Signal transferring cable included.
- Tripod screw mount.
source