Well, obviously I use WebProWorld. And I recommend clients seek out the forums in their fields, and choose at least one in which to participate. I also belong to webmasterworld, but rarely post there ...
I have also recently joined several social networking sites. so far, I like:
- Xing, which seems to have a solid business groundwork and I am impressed with the new contacts I've made there (thank you webnauts).
- LinkedIn - I found solid existing connections here ... in other words, many in my RL network were already here.
- Facebook, which I see as a more 'personal' social networking site.
I also joined a few others ... Tagged seems interesting ... and I have a Squidoo lens I would like to develop further ... but I have yet to really explore all the possibilities.
This is a great topic ... I'd like to see WPW explore more on social networking ...
If anyone wants to join me on any of these sites, please let me know ...