OnePassMan,

In addition to looking in the links that eugene searched for, you may want to post more infromation about what you are looking for. I have stayed at a few hotels in london and there is a huge range. You can get something clean and ok for USD50 to a full service "american" style hotel for USD400 and up. Also do you need to be near the central city? Is underground access iimportant, or can you be in the outskirts with train access? This will help those here answer your specific question.