My thinking behind a USB key is that it's pretty clear it belongs in a PC/Mac or if your TV/DVD Player has USB on the front it will be able to handle the pictures on the stick anyway.

I get calls from mainly mothers of the bride wondering why they can't play the slideshow on their TV, when in fact they have been give a copy of the JPG DVD not the slideshow.

I think I'm looking at a 3 way solution, a USB key for the JPGs, a DVD for the slideshow and a sealed gold archive DVD for backup/long term storage along with a clear set of instructions and copyright explanation.

There is of course the train of thought that once I hand over the pictures it becomes their problem to look after, but that doesn't really fit my whole ethos.

Cheers

Cris