HootSuite for Twitter & Facebook
This app is ground-zero for the CMOs social media intelligence dashboard and outbound messaging platform for his or her entire marketing team.
HootSuite helps you manage multiple Twitter, Facebook, and other social media accounts in one place. It also provides automated content posting features and persistent search queries to keep tabs on partners and competitors.
Because they provide such a robust web version, you can hop to any system (including iPad) and all configurations are live. Plus, your team needn't install and setup native clients. This system also provides integrated social team management features that allow you to control and commend the social media process from one application.
HootSuite is only available for iPad (presently) but that will change soon. On the iPad, the native iPhone app works fine, and the web-based interface also works pretty good in Safari.