Just been looking at the settings screens, ref the image resizing options, are these all using external services, or can any of them work on site. If on site can be used once an image has been sized is it then used for every page refresh or is it resized each time the page is loaded? Still worrying about server load here as we're on the cusp of our host forcing us to go for a higher CPU package which will likely bust our budget and shut us down.