I have had my board on the ceiling for years- specially long boards- and have not had any problems. I have done what everyone else had mentioned- and if your tall enough its not hard to take them down or put them back up.
Find some nicer looking rope- like 1/4 inch thick or something- west marine has some cool looking sailing rope. Then get 2 eye screws and 2 hook screws at the hardware store. Use one or each of the screws to put in the front and one of each for the back- make sure you screw them into a joist or something- not just drywall or the board will fall down. Make a sling with the rope for the nose and the tail- and here is the trick- for the back- (and the front)- tie one end of the rope to the eye screw and measure it so it holds up the board to the proper hight- then on the other side make a big loop with the rope (tie the rope in loop) so you can put the loop on the hook- so its super easy to take down and put up- you just have to unhook half (with the loop)and only the back- you can slide the nose of the board in and out of the front. Works like a charm.
i bought 'hook-ups' from www.surfindustries.com. they have FCS, future and single fin box hangers that slide into the plugs on your board and are very easy to use. I bought cheap hardware from Home Depot that I mounted to my ceiling and now I can hang 10 surfboards where I could only store one (horizontally) before. They sell them in sets of 10 on the website but I was able to buy them as separates from Sweetwater Surf Shop in NC and they mailed them to me. Definitely worth it.