I have tried both ms office live and google app service. Frankly I tried to upload a excel sheet containing 20K+records (size around 400kb), google simply failed. Google website template are really bad however gmail give better User experience than window live mail. Microsoft give free domain (for example my domain enterprisemobilityindia.org) while google ask you to setup your domain (example www.fanclubindia.com). My concern on both cases, I shall have to be bounded by either microsoft or google. Today they may not be charging but you cannot be sure about this in future. I can get cheap root server and lots of opensource software to run my server. I think it is not prudent to go either google way or microsoft way!