Tubthumper speakers will help you get your garden groove on. You plant flowers or shrubs normally in the faux terracotta pots, which have 90-watt speakers built into the base ($100 each; $175 for a stereo pair). Then you wire them to your stereo, pop on your favorite tunes, and enjoy. Apparently, waterproof, weatherproof, and dog-pee proof (ok, it doesn't say that, but I assume), they can be left outdoors year round. While all that sounds great, if you have one of these, expect to explain why music is coming out of your geraniums to every new guest.
Garage in the Garden?, via Shiny Shiny