I would agree with a Bakuman anime. There are definitely a lot of shoujo manga I would love to see as an anime such as Fushigi Yuugi: Genbu Kaiden, The Gentlemen's Alliance Cross and Mixed Vegetables. There was this cute short manga (I think it's shonen-ai but it's not listed that way...) called Jihai. I think it would make a great 13 episode series.
That's all I can think of at the moment but there's probably more.