Dorothy, you mean social networks? There's nothing with signing up with them all, if that's even possible. But since they are so time consuming it's best to find a couple that fit your needs as a mom, blogger, small business owner, pet lover, etc. so you can find cool people to connect with.
I have been thinking about this same thing lately. I feel like there are so many social networking site, clubs, forums, listing sites etc. etc. I am feeling a little overwhelmed, because I like to participate this the sites I am a part of.
I agree with Anne-Marie, that it is best to find a couple that really fit your needs.
Thanks so much ladies! Yes, I was starting to feel a bit overwhelmed as well. I really enjoy networking and getting to know other moms too, but I've noticed, most of them I'm meeting are on the other networks too.
I agree with Anne-Marie as well. Join the social networks that you feel will best suit your needs and what you want them to accomplish for you. As long as you don't put the social networks ahead of everything else. They can get very addictive and if you're not careful can dominate the majority of your time online.