Microsoft knows you're making throwaway e-mail accounts, and wants to make that process easier.
Today, Hotmail is getting a new feature aimed at "e-mail enthusiasts," which lets anyone create multiple e-mail accounts that can be read, replied to, and managed from their everyday e-mail inbox. These additional e-mail addresses can be had in the same manner as signing up for new accounts, but they require no extra log-ins or upkeep.
It looks like a good thing. Though it is limited to five aliases now with plans to increase to only 15.