Well you can tell by my user name that I'm partial to Labs, but there are lots of other breeds that enjoy dock diving too -- take a look at the results from an event http://www.splashdogs.com/events/results/
and you'll see the top dogs are often not Labs though most are retriever breeds. There is a lot of good info on the Lab breed out on the web and I'm sure you're finding it -- there are many reasons they are the most popular dog in the US (we've adored the 5 Labs in all colors that we've owned over the years after doing breed research many years ago).
Coming to see a dock diving event is a great way to learn more about the sport and talk to owners who are happy to share our experiences with the breed and dock diving. Unfortunately, you just missed the Sportsmen's Expos that were nearby but keep an eye on http://www.splashdogs.com/events/
-- Auburn isn't too far away.
One of the great things that attracts people to dock diving is you don't have to spend lots of time training. Most of us are just doing normal fetching (my 1 yr old needs at least 4 fetch sessions each day!) and basic obedience (sit/stay) with our dogs anyway, and then show up to have fun on the dock without any special training. Of course, getting further distances can be helped by swimming and other conditioning, practice jumping off docks, and (the bane for many of us) people practicing good throws (Ursula, you can stop laughing now).
If you're really interested in getting a dock-diving dog, you'll probably want to get an adult dog who is already showing lots of interest in retrieving (toy drive) and willingness to jump into the water. Of my 5 Labs, only 2 of them really have those qualities naturally -- I would have never guessed my 1 yr old would have talent when I selected her at 8 weeks old so either get a puppy and then be happy to do what they are good at, or select a mature dog who is showing the right interest. You can find rescue sites like http://www.petfinder.com/
and be sure to ask about retrieving and swimming interest.