Thanks for all the replies. I have two small children, ages 2 and 6, so I think they will get several years of fun out of a pool slide. (Not to mention me.) The problem with the diving board is that the deep end of the pool does not extend far enough out from the board so an adult diving head first must "pull up" to avoid hitting the bottom.

As far as my insurance company (Allstate) is concerned, my liability insurance is not affected by whether or not I own a pool, much less whether the pool has a diving board or slide, so thankfully that's not an issue for me. However, liability does seem to be an issue for the pool companies, since the ones I contacted will not install a slide for me.

At this point, I am looking to buy the slide over the internet and find a local pool service company that will install it for me. Since it involves tearing up the deck, removing the existing diving board, and installing and plumbing a new water line for the slide, I was trying to stay with the larger, established pool companies in the area.