Putting my day hat on, the answer on the bridge is that it will be pretty much what you see today, except with wider sidewalks to accommodate bikes and pedestrians. The current plan still leaves it at 2-lanes, simply because the bottleneck of the Tacoma street approach doesn't allow much more than that... though they've looked at 4-lanes (lots of neighborhood opposition to that idea, as you can imagine).
The really exciting thing is that the new light rail line from Portland to Milwaukie will include exactly the kind of bridge you're describing - bike, ped, bus, streetcar and light rail -- and will be located between the Marquam and Ross Island bridges. We're in for quite a treat, because the conceptual design calls for a cable-stay suspension bridge, and obviously our first of this sort in the region. Nice addition to our wonderful bridge museum!
Here's the website on this project:
http://trimet.org/pm/planninganddesign/bridge.htm
This bridge will happen before the Sellwood, simply because the bulk of the LRT project is funded, whereas the region is still trying to cobble together funding for the Sellwood.
Tom
