Hi A.! Sounds like you're planning a fun party for your hubby! Lucky guy!
I run a (mom-owned) company called Nice Occasions. I make all sorts of unique party favors including wrapped hershey chocolate bars with customized wrappers (can include photos, names, dates, whatever you want on the wrapper). They are very cool. People like to give them as party favors at birthdays, showers, weddings, etc.
I also do dvd photomontage slideshows. I actually just did one for a 40th surprise birthday party. The woman surprised her hubby with a dvd slideshow. He LOVED it. It had pics of him when he was a baby, growing up, pics of the couple dating, from their wedding, honeymoon, and then pics of them with all their kids. When the woman brought it out and showed it at the party, she said there was not a dry eye in the house by the time it was over. These slideshows can be very sentimental and emotional or very fun and happy... whatever you want!
I'm actually offering a 15% off discount through mamasourse. My company is called Nice Occasions and the website is http://www.niceoccasions.com/
If you are interested, I can send you a copy of the 40th birthday dvd that I just did so you could get an idea of what it would be like. This one also included artwork (drawings) that their daughter had made. So you can include more than just photos if you want.
Good luck with the party planning, and I hope I can help you out!
A.