You can attach images as mentioned by RichGem if you reply/post using "advanced mode".
Or use imageshack.us (use the hotlink way at the bottom of the page though after uploading)
Or use pict.com if you have a heap of images that you want to link to as an album.
Ther's probably better options, but that's what I use and they seem to work.
You might be able to upload some pictures here, either as attachments or albums, but it's at low resolution and limited to 97kb in size or thereabouts, and might depend on contributor status--don't know offhand.