I love cooking, but I hate dicing! I have a food processor that can slice really well, but it doesn't have any ability to do dicing.  Does a device that can automatically dice various produce (peppers, potatoes, carrots, that sort of thing) exist? 
Honestly, dicing is very quick and easy if you use a good sharp knife and the proper technique.  I strongly suggest having a look through our knife-skills questions and in particular ones like How to dice tomatoes?.  I guarantee that with a little practice, you'll get better, more consistent results than any overpriced kitchen gadget.  A good chef's knife is the better investment.  Nevertheless, on the days that I am feeling incredibly lazy or am running particularly short on time, I'll sometimes resort to using my Progressive Onion Chopper.  Note that I'm on my 3rd one now; they're made of plastic and tend to break easily if you apply too much pressure (which you sometimes can't avoid doing if you want to actually make a clean cut).  I really do not recommend these for heavy-duty or prolonged use; as I said above, they're useful for the occasional bout of extreme laziness. 