Chances are, if you have an iPad, it’s used by more than one person in your household. And those other people probably have Facebook accounts too.
Instead of logging in and out, download Friendly.
Friendly is an iPad Facebook app that allows for multiple accounts. When you startup the app, it’ll ask you which account you want to use. It also has user switching built into the app if you need to switch while using the app.
There are other features too like an iPad optimized interface, full screen photo presentation, Facebook chat and all the Facebook features.
There are two versions of Friendly; a free one and one for $0.99. I’m not sure the difference but, for a dollar, it’s worth supporting.