The beta test for Dawnguard - the forthcoming expansion for The Elder Scrolls V: Skyrim is underway for those who own an Xbox360, and some new details have emerged as to what the content includes:

• There are two paths to choose from - either join an ancient clan of vampires who intent to blackout the sun or be a part of the titular Dawnguard, a group of vampire hunters.
• Joining the former will allow you to become a power vampire lord with unique abilities such as Vampiric Grip (think force grip though this will drain your health) as well as transforming into a swarm of bats. My guess is that your claws/hands will act as powerful weapons
• A new weapon has been introduced - the crossbow, which although powerful has a long reload time.
• Two new perk trees for both Vampires and Werewolves
• The expansion is rumoured to be around 15 hours in length

Thanks to Skyrimdlcnews for the news; you can head over to their page for more info on what the two perk trees entail.