Illustrator is not something I hear people using for web anymore ... it's almost always either PSP (Paint Shop Pro) or Photo Shop. And there are solid believers in both camps; it can get like the PC/Mac wars (let's not start that...)I was happily using PSP for years when my company merged and the new leaders said thou shalt use PhotoShop. So I evaluated. It was better for a while; not now. Not for my needs, anyway. So I do my primary work in PSP and export to psd format so my company doesn't know the difference.
I should note that besides ImageReady, I also keep DeBabelizer on hand when I get that CD full of product images that all have to be resized, copyrighted and saved as jpg for a client's catalog. That's a wonderful automation tool ... do it once to one image, save what you did and run it on an entire directory of images. Come back in an hour and it's done.
I'd be interested in the graphics compression test, too. I posted the following
http://www.effierover.com/test01.tif (397,547) http://www.effierover.com/test02.tif (323,960) http://www.effierover.com/test03.tif (294,150)
PSP save as JPG produces 139,039 - 118,986 - 107,505.
ImageReady set to medium quality jpg (which is as low as I like to go) produces 28,640 - 21,064 - 15,884. I saved these online as
http://www.effierover.com/test01-opt.jpg http://www.effierover.com/test02-opt.jpg http://www.effierover.com/test03-opt-jpg
because I believe no file size test is complete without a visual comparison. Some graphics programs compress and damage the image.
So, how does fireworks do? 