At least 4 if you count forums. - Jack (a.k.a. Jeber)

For me three I suppose Twitter, FF, and facebook .. - Sunny (The Geek Lord)

same here, but i dont use twitter much. - Mike Nencetti

I think FF provide me live discussion and Facebook enables to connect with friends - Sunny (The Geek Lord)

And Twitter for random BLAHs :) - Sunny (The Geek Lord)

At one point I was up to 9 currently down to 2-3. - Jimminy Fuller

Too much social networking can be too much time consuming and hard to track. I usually hang around FF and all my comment are tweeted to twitter - Sunny (The Geek Lord)

FB, FF & Twitter. - Mellissa

So at the moment only FB, FF and twitter is on lead ....Anyone ? - Sunny (The Geek Lord)

Oh so you wanted actual names of sites, well FF, Stumbleupon, Twitter, Digg, Myspace(yes it's on here), FB, and Reddit - Jimminy Fuller

6 - Glen, Bespectacled Elder

@jimminy they are more then 2-3 :P . - Sunny (The Geek Lord)

You know what guys, There are many services pops up everyday but after few days they are just yet another service. Most of us just try the service when they release and then they are abandoned. For example sceenr.com, if you look at the alexa map of its traffic its just horrible and will prove what trying to say. (My Point of view) - Sunny (The Geek Lord)

Well I use 2-3 of them a day, FF and Twitter the others go around and around, somedays I visit 5 of them, but normally it's just 2-3. - Jimminy Fuller

FF. I use it as main aggregator so all other social platforms [Digg, Twitter, ...] end up here - lelapin

lelapi : where you do actually communicate (Jus curious) - Sunny (The Geek Lord)

Mostly from FriendFeed and, as close second, Twitter. Marginally use Facebook only because of some friends I have there (and because to be honest FF is not as easy to understand). - lelapin from email

FB, Twitter, FF, Livejournal and some forums - Dimitar Vesselinov

Well now Twitter is more than random Blahs to me. Boy it got substance. - Sunny (The Geek Lord)