I use a photobucket account. It's a bit of a chore but once saved to my pc I upload my pictures to photobucket, once uploaded there is a dialog box under the thumbnail of the picture when you hover the mouse cursor over it, click on IMG code and it automatically copies this to your clipboard then in your post right click, select paste and the picture will appear full size as a direct link.
If you are a member of WSF there is a very good photobucket tutorial by one of the admin on the forum help and suggestion board.