GameSpy DS

Offers information, news, and screenshots.
http://gba.gamespy.com/nintendo-ds/castlevania/

Nintendo Insanity

Preview, by Karl: "All in all, Castlevania DS is looking like the DS side-scroller we’ve all been waiting for."
http://www.n-insanity.com/modules.php?module=previews&id=76

Planet GameCube

Preview, by Jon Lindemann: "Castlevania DS looks to be another great installment in the classic series. It's sure to be one of the most anticipated upcoming games for Nintendo's handheld."
http://www.planetgamecube.com/previews.cfm?action=profile&id=343

Gaming Target

Preview, by John Scalzo: "The DS' wireless connection is also set to get a workout with Castlevania DS as Konami has said part of the game will revolve around collecting souls of defeated enemies to gain new attacks. These souls can then be traded over th
http://www.gamingtarget.com/article.php?artid=3869

GameFAQs

Includes information and a message board.
http://www.gamefaqs.com/portable/ds/data/922145.html

GameSpy DS

Preview, by Christian Nutt: "Really, as much as hype is a disease fomented by the web, there's very little doubt that Castlevania DS will, at the very least, rise to the quality level of the enjoyable Aria of Sorrow and look great while doing it."
http://gba.gamespy.com/nintendo-ds/castlevania/583554p1.html