Bob haircuts are used by many years, womens all over the world and to change the bob a bit you can have short layers cut in the back for a sexier effect. So if you want a short haircut trendy and easy to maintain the bob haircut is easy to keep up and never goes out of style.
Another option to make a modern bob you can try the angled bob, have one side of the hair longer than the other. Women love the angled bob haircuts because it is simple but it makes a big statement. Bellow you have some type of short bob haircuts for women in winter 2010: