Jim Hines talk about warrior women over at his place, in reference to the character Talia in Stepsister Scheme. Check out the comment thread. Lively debate, with lots of good points.
This calls to mind a series of posts by Carrie Vaughn on UF heroines (UF in general, but with emphasis on UF heroines) which also referred to a post by Lilith Saintcrow on the same.
Personally, I'm a fan of warrior women. Way I see it, if women want to fight in combat, on the frontlines, and they train hard and take their requisite lumps, go for it.
(I do write about a pair of warrior women so I might be a little biased.)
UPDATE: More on butt-kicking heroines from Sherwood Smith. (h/t: K.C.Shaw)