At the Shinjin Kouen Yokohama FIRE Concert, Tsunku announced by video that S/mileage will graduate from Hello!Project Egg in the Spring of 2010 after the Hello!Project Egg concert in spring to have their major debut.

Conformation of this is that S/mileage now has an official H!P profile and Tsunku has also confirmed it on his blog. (See below for links)

Congtarulation S/mileage and I hope you do well and you have all your fan supporting. ^^

Tsunku Announcement At His Blog which has the pictures of S/mileage from the concert

Official S/mileage Profile on Hello!Project Site