The 23" acts as my main screen which I use for work related tasks, safari, entourage etc. And then Pbook screen is used for iTunes and Adium messages.
I used to have konfabulator widgets on the pbook but then I just stopped using it. Half the time I don't really use the PBook screen except with iTunes. I also realised just yesterday that my iCurve has been the wrong way up! (Have since swapped it round only to find it much better!).
Sadly though it's all going up for sale in about 3 months on ebay so I can get a G5 Imac and some cash in the back pocket!
Oh and yes in System Preferences -> Displays - You can pretty much alter anything you want, having the dock where you like, the placing of the Pbook (you can even have the scrolling occur beneath the 23" display and arrive at the top of the powerbook! As well as switching the toolbar across the top to the pbook screen.
In case you're wondering where my dock is I just set it to automatically hide.
And the background for my display was found in the February desktops, but I'll post it as an attachment.
*Wishes he could find a gorgeous, wireless two button mouse and white mousemat :S*
