I charge $10 an hour, plus supplies. Sometimes I feel that's almost not worth it. I usually give them a CD of the images I've scanned for them, but do not give them images of the layouts. Just because I was trying to be careful of any copyright issues...and really no one has ever asked for it. I recently did a video graduation slide show and that totaled about $160. When I did my cousin's scrapbook, I charged $10 an hour for the creation and $2.00 per page for the book (they did 8 x 8). They picked out and bought the book. Theirs ended up being a book and a video and I think I charged them about $225 for "labor". Then the cost of the book was on top of that....I think it was like $35 or something.
Some people have said I could charge more and, occasionally, I've thought about it. But I'm usually creating for family and friends and do it more to be creative and help them create something they love, than to make money.
That's my two cents.