We've come a long way from "warning: 800x600 pixel gif here", this image is so big however that I think that a warning is suitable, if you are not on a machine with a lot of memory you should probably not click on the large version of that image unless you'd like to listen to your hard drive for the next half hour or so.
Cutting it into tiles and creating a custom Google Maps view of it would have been nice. It looks[1] reasonably simple to do, and means your users don't need to try and render a 15kpixel wide image. Even with 4G (ok, that's not all that much these days, but I still consider it reasonable) of RAM, it took down my browser.
RAM usage jumped about 280MB when viewing the full size image. No problems with my system choking with 4GB RAM and plenty of programs open (2.5GB used). (Tested in Firefox and Opera, Win7x64.)
