[markem]

Short, sweet, forgettable. They aren't there for your speech. Target the older women in the audience. If they think it was sweet then you did good.

Some of the best remarks that I have heard in such speeches are along the lines of, "Who would have thought when you were a mere babe in Aunt Martha's arms that you would meet such a wonderful and loving person as your new wife". Simple reference to the extended family coupled with compliments on doing so well.

Mind you, if there is a well known event, an oblique reference can be heartwarming in the appropriately sappy way. "All of us, of course, hope that your children have the good sense not to make smores with a welder's torch".