Just read the message from Twitter: seems the Windows Phone 7 Mango beta system will be release in 24 hours.

mangobeta00

Original Twitter URL is here.

Actually, it is June 22 now, I think Microsoft will release today ?

Anyway, we still hope Nokia can release their WP7 earlier. Seems the end of this year is too long for WP7 fans.

There is a related article about this news here.