Cameras modules for my project I would like to implement a camera to my Arduino project.

So far I have worked with some sensors (e.g. distance), Wifi and Bluetooth modules, buzzer etc. You can find some very good examples on the web on how to use these things on your project, from the wiring to the sketch.

But when we talk about cameras, I feel like things start to be more difficult - I don't know if it's because camera users should know better what they are doing and therefore don't need a step by step guide, if simply there is a lack of information.

I see myself like this guy and this guy. We just can't find a tutorial!

I'm looking forward to buy a VGA OV7670 AL422 FIFO camera or a Serial TTL JPEG with NTSC video, but I don't want to spend my money on something I won't be able to use.

There is any better camera I could buy (by better I mean an easier camera to start working and with some information for the implementation)?

Thank you.
I am currently experimenting with this module: http://www.uctronics.com/mega-pixel-camera-module-mt9d111-jpeg-out-p-227l.html

I2C connection and supplies are working fine with an Arduino Uno, but getting the image data with an Arduino might be not possible.
You can slow down the Pixel Clock of this module to 375kHz, bit I think the  GPIO read-out speed (at least with the standard digitalRead functions) and memory of the Arduino are not sufficient...