If it's still really big (which, although the forum can resize, still can end up lagging people), you can use Pixlr.com to edit the photo to resize it, save it with the new size and then upload it and all.
To resize an image on Pixlr (and in most editing programs), just click on "Image" and then "Image Size" and adjust the measurements to make it smaller.
Personally, I would choose Imgur. It's a pretty good with editing photos as well. But hey, that's just my opinion.
As I saw the creature, I was as white as an egg. I was so scared I might crack from fear. As the humanoid began to lunge after me, I was walking on egg shells from how scared I was. It grabbed me, took me to its station, and cracked me open. The last thing I saw were my yellow insides cooked on a pan. Human nature is as evil as a rotten egg.
Stuff: Exodis is funnier than people give him credit for.
"Suddenly Frodo noticed that a strange-looking weather-beaten man, sitting in the shadows near the wall, was also listening intently to the hobbit-talk. He had a tall tankard in front of him, and was smoking a long-stemmed pipe curiously carved. His legs were stretched out before him, showing high boots of supple leather that fitted him well, but had seen much wear and were now caked with mud. A travel-stained cloak of heavy dark-green cloth was drawn close about him, and in spite of the heat of the room he wore a hood that overshadowed his face; but the gleam of his eyes could be seen as he watched the hobbits."