I would love to have a great big fan with a mist to put on my tomatoes. I just have a red neck shade system made out of white sheets.

I think you need a filter of some kind on a mist system or you'll get deposits of minerals on the plants. I knew somebody that didn't have a filter and she lost a lot of plants that way. I use shade cloth on tomatoes, peppers, eggplant and melons if they're fully exposed to prevent sunscald.

Don't get tomato plants wet. It encourages plant diseases of which tomatoes are very susceptible. Also what sundrop07 said is true. If you install a system its better for the system if its filtered. Also the water should evaporate before it comes in contact with the plants.