Lots of pics on the page. They're very large I won't link them here because I have no idea how to make them show up smaller.
If you have a PC, use Paint. If you have a Mac, use Seashore. Both are free, simple photo editing/drawing programs that you can use to resize a photo and change its compression to make the file size smaller.
Despite the 5,000 Kb limit posted, I've found the board tends to choke on anything larger than 1 Mb, which is really more than enough for a big picture with a lot of detail.