Common Property for Google Widgets: What to Open

I'm slowly getting hooked on the iGoogle personal, configurable homepage. I would like to see the different widgets all have a common, settable property for how to "open" when expanded. Mostly this choice would be New Tab vs. New Window (assuming current tabbed browser editions); could include a pop-up small-browser; and where applicable, "custom default" (as for Google reader, where it has the lovely pop-up).