shooting a big wedding that will have an overflow. any good solutions to going wireless from my camera to an hdtv in another area that will show the ceremony to guests?
probably `150-200 ft

Running a SDI cable is the most reliable. Beyond that you can rent one of the wireless setups for a couple hundred bucks.

For a rental it would be something like this - http://www.lensrentals.com/rent/video/accessories/monitors/paralinx-arrow-plus-1-1-hd-wireless-kit

If you want to buy one - http://www.bhphotovideo.com/c/product/1017732-REG/camera_motion_research_rm11_radian_mc_tx_1_rx_multicast_wireless.html

Also as a FYI, its frowned upon to post the same thing across multiple sections of the board.