I like trees as images and decorations and also for their symbolic meanings. So when I saw a Tree of Life picture frame this morning at Duane Reade I knew it was meant to be... posted on this blog.

So, its not technically DIY, since you would have to buy it, but its sort of a semi-DIY since you still have to add 10% of your homemade photos. Plus its still cheaper than hiring a florist to make centerpieces.
I think the frames would make a very cute centerpieces, or a nice way to decorate the place card table, or just a nice frame to have at your home. You can put in pics of you and the hubs from various times in your lives and your guests can enjoy perusing them during the reception. I would put pics from different age groups on different tables which (hopefully) would encourage guests to go over to each other's tables to check out all of the different pictures. The best part is that they are only $14.49. They are also available in bronze but they are more pricey. Go pick them up at your local Duane Reade or order them online at Amazon (here for silver and here for bronze).