This is something to get excited about. The DAR has made accessible for free the DAR Genealogical Research System on its public website. There is too much there to describe in this post. Let me tell you what I did to give you a flavor for what you can do.
I put in the name of a Revolutionary War ancestor and up popped his date and place of service, birth, and death; his pension number, and a short description of his service. Also listed were his residence, spouse, and all of the people who have established a formal relationship to him for the DAR.
Dick Eastman has written an extensive review of this capability and you can find his article at: http://tinyurl.com/yft4fxc.
The link to the DAR site is: http://www.dar.org/library/online_research.cfm