The mobile tabstrip is not scrollable and the stacking that takes place when the viewpoort is too narrow to contain all the tabs is unsightly and grabs precious screen real estate
That's absolutely not true. Google has been doing this in android now, and I think you guys should definitely rethink your approach to this.
Our baseline for mobile widgets are native equivalents on the various platforms. Since there is no native equivalent of what you describe, we're going to pass on adding this.