Cam Ranger!!!! I love it. Everything you want and more!!!!!
For use with iPhone, iPod Touch, and iPad.www.camranger.com
$299, so it costs a little bit, but worth it I'd say.
From the site:
Capture & View Images
Capture images in all drive modes. Then view full resolution images in JPG or Canon RAW and optionally save to an iPad, iPhone, or iPod Touch. CamRanger is a great wireless tethering solution.
Wirelessly stream live view to your iPad, iPhone, or iPod Touch. Complete focusing control with touch focus, incremental adjustments, and focus stacking.
View & Edit Camera Settings
Remotely change and view camera settings: Aperture, Shutter Speed, ISO, White Balance, Drive/Shooting Mode (Single, Continuous, etc.), AF, Metering Mode, Image Format, Auto Exposure Mode, and Exposure Compensation and Bracketing.
Wirelessly record movies to view and edit later. CamRanger supports touch focusing during movie recording for many Nikon and Canon cameras.
Intervalometer / HDR
Setup intervalometer (time lapse) or HDR on your CamRanger. No need for your iOS device to remain connected after the initial setup.
Macro & Focus Stacking
Perfect for macro photography where your camera is in awkward locations or very precise focus control is needed. Use automatic focus stacking for enhanced depth of field.