Photobucket is your friend. bottom link of the 4 once you get it uploaded. the one with the Img code.
Or you can right click on someone else's pic, copy and paste the URL Address to here. then highlight the URL address like you were going to copy and paste but instead just click in the lil Img button. That should post the pic.
So if you click on my sig pic and copy and paste the URL you will get thie.