I recently started using HootSuite and Ping.fm. The combination of the two web apps is amazing!
HootSuite can manage multiple social networks at once, allowing you to put each feed into a separate column onto tabs. I have Facebook, Twitter, Myspace, and LinkedIn all feeding into HootSuite. I no longer have to go jumping around the web to visit all of my social networks just to see what's going on.
With Ping.fm, I can update all those networks at the same time. Or I can send a message with a simple tag that I have designated to send it to a specific network or group of networks. Ping.fm also connects with HootSuite, allowing me to ping straight from my HootSuite dashboard.
One Ping to rule them all!
Get HootSuite here!
and Get Ping.Fm here!