You forgot to mention the wonderful Save for Web facility in Photoshop which gives you three options for jpgs,gifs and their possible download times and resizing.Look under File.
It's a very useful tool and itââ‚ ¬ÃƒÂ¢Ã¢â‚¬Å¾Ã‚¢s quicker because you donââ‚Âà ‚¬ÃƒÂ¢Ã¢â‚¬Å¾Ã‚¢t have to open Image Ready.
Incog.