Well Ms. Marvel should definitely have her own solo series. I love the evolution of the character and would definitely add it to my pull list. There's many good female characters in the Marvel universe, but Ms. Marvel seems to be one who I see as a solo character (unless she goes back to the mighty avengers, which is the team she belongs on IMO).
Also, Spider-Woman. I picked up the last series on ebay cheaply, wasn't expecting much out of it, and despite the gripes I did have with it, it was one of the best series I had read in a long time. I hope they do resurrect SW