I've just been invited (and have joined) Linkedin which looks like a great networking tool (in theory) and was sent to me by a trusted ex colleague. Is anyone else a member and if so, have you found it useful? I fully expect no-one to be using it but if you do I'd appreciate comments. (btw, if anyone who 'knows' me would like an invitation please email me, it allows for adding contacts who are friends, not just professional relationships)