You can! And it's way quick and easy, too. I inherited my SS from someone else, but I have completely fallen in love with it in the last week and will never ever use another social media app, seriously. The integration (at least on my phone, I realize other versions may be buggy) is seamless, everything posts FINE and the Foursquare integration is perfect, because the Foursquare update messed with my browser.
I don't see Myspace or LinkedIn unfortunately, which is either due to my version or due to it not being supported yet, but since I don't use Myspace anymore and I haven't touched my LinkedIn since I made it, it doesn't bother me that much.
I hope you get it! It'll blow your socks off.