The CBB Digest is archived on LiveJournal
There are also CBB links onFacebook
which takes the digest automatically from LJ
You can [may!] friend EBD on Facebook or myspace!
Similarly there used to be feeds into bebo
but they now direct people to the LJ site for the up-to-date Digests, although there are plenty of other items of EBD interest on them, and there was talk of a Secondlife link, but that may not have come to anything.
All links included here for reference as people use different sites, and the feeds mean they don't necessarily have to go to LJ if they normally use FB, for instance.
If anyone wants more sites added, or know of links to anywhere else the digest appears, just let me know