At their invitation, I've just joined LawLink, and had this blog added to their directory. LawLink describes itself as "the first and largest social network exclusively for attorneys in the United States", with over 4,000 members. Recently, however, it opened its doors to lawyers in this country. It maintains a directory of (currently) over 300 law blogs, although as far as I can see there are presently only two UK blawgs in the directory.
So, what services does LawLink provide? Well, firstly (and obviously), it provides a means to network with other lawyers through your profile, law groups and a forum. It also allows you to upload and share legal documents, advertise for free, and keep up with legal news and blogs. At present, it is very US-centric, but I expect that this will change as more lawyers from around the world join.
Joining is simple, and it's 100% free. What have you got to lose?