The first 4 episodes of
Queen's Blade have suddenly popped up on Crunchyroll last night, without much fuss, other than a forum
post there highlighting the news. The streams are made available by the North American publisher Media Blasters, who already has a few other live-action and anime titles streaming on CR, including
High School Girls (a.k.a. Girls High / Joshikousei),
Kite Liberator and
Ramen Fighter Miki.

Mind you, there is no indication in their post that the complete Queen's Blade series will be added soon (if ever), and in fact free users will have to wait another month before they can even watch episodes 2, 3 and 4 - which are currently reserved for
members only. The first episode is available to "everyone right now for free" - that is, everyone living in the US or Canada.
A warning about this being a
"mature title, so viewer discretion is advised" is also included in their announcement, and so is the following story outline.
In a land where a queen is chosen every few years solely by winning a tournament, there can be no short supply of formidable opponents. For one woman warrior however, an early defeat clearly shows her that she is lacking in experience though she may be bountiful in body.
Fortunately, while defeat could spell one's doom, her life is saved by a powerful stranger. But unfortunately for this savior, less-than-pure motives and shrewd family members mean her reward is a prison cell. Her release is prompt when the unseasoned warrior she saved, tired of her current lifestyle of nobility, sets off to prove herself.