Very early in a beta means it will be another year before it is released to public. The obvious concern is, it will be left behind again as microsoft is taking eternity to bring any new products out. Yahoo is testing their new mail system, gmail might (already super accomplished) so lets see how kahuna performs. I dont necessarily think hotmail will manage to get the users back that have left hotmail for other better emails but they might win the current users for more time and get new ones to sign on.