Drum and bass websites are to be found in great number. However quantity doesn't always indicate quality. Many atrocious websites offer little or no content. Better ones have everything from production guides, dnb community forums, streaming media, and downloads.
here are a few examples:
http://www.dogsonacid.com/
http://www.breakbeat.co.uk/
http://www.missrepresent.com/
http://dnbforum.com/
http://www.paradox-jungle.co.uk/