Windows Live Hotmail, currently in Milestone 10 is set to come out of beta as early as this week, according to number of indications on the web, including this post on Messenger Stuff. The post includes a screenshot of a French Hotmail email newsletter item, which says (translation from Messenger Stuff):
Just over few days before it's available to everyone!
The official launch of Windows Live Hotmail will take place in a few days! Therefore very little time remains for you to test before everyone has the new version...
The launch is nearly here!
In addition, Darren Straight points to a Windows Live Hotmail Marketer Briefing being held at the Boston Sheraton this Tuesday (April 17). While there's no mention of the end of the beta, clearly marketing for the final product is ramping up.
Thanks to the Kahuna/Windows Live Mail/Windows Live Hotmail beta team for putting on a beta the way they're meant to be: open and flexible.
Microsoft, Live, Windows Live, Windows Live Hotmail, Kahuna, Live Mail, Beta