The wanted extra was a Weiß Schwarz promo card:
"New challenge! 765 Pro" card, using iDOLM@STER anime designs.
The other extra was a reversible long poster:iDOLM@STER poster featuring Hibiki, Miki and Haruka in maid uniform.
Swimsuit Madoka from Mahou Shoujo Madoka Magica...
..and swimsuit loli-Nanoha from Mahou Shoujo Lyrical Nanoha.
And the rest of the magazine is not really interesting, since Megami tends to be a massive pin-up collection of recent anime, most of them I don't even follow.
The only interesting thing is the character designs for iDOLM@STER anime.