I use a laptop without a mouse as my main work system, and I could really use a fully keyboard-driven email client with graphics support.
Right now I have the option of using GUI clients, which, even if they support the keyboard, are optimized for the mouse (buttons and menus taking screen space, actions based on navigating menus with the arrow keys, etc) or terminal-based clients, which don't support embedded images in HTML messages.
Is there something that tries to mix the best of both worlds?