use photostream as backup solution when traveling

hey photographers!

I was wondering if it's possible to use photostream to backup the photos taken with my Nikon D40 to iCloud when traveling for a long time.
Maybe it is also possible to wake the mac over the internet and run Aperture so it downloads the pictures and makes a time machine backup.

Does the iPad still delete the exif information of the importet photos? That would make this solution useless.

It would be like this:

Nikon D40 -> SD-card -> camera connection set -> iPad -> iCloud -> Mac


Is anyone doing this? I just came back from my first trip with iPhone+iPad and absolutely loved to watch my pictures taken with my iphone on my iPad. Would be great to add my Nikon to the photostream family

Edit: forgot to mention I want to transfer photos in RAW format.

 

Well, thanks for your input anyway. I already use a free account on Flickr and like it.
Do you transfer RAW or JPEG? I use RAW only, because that way I can take more pics/sec on my camera.
When downloading the pictures from Flickr Pro are they exactly the same as on the camera?

 

For anybody interested in this, I just found this article: http://www.tuaw.com/2011/11/06/deep-dive-aperture-and-photo-stream-how-do-they-work/ in which the author says the iPad in fact does upload RAW pictures as long as they're not modified. So I might give this a try.

Why? This is much better than no backup at all. Especially with a Mac at home downloading the photos.