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I liked the spiral bike bridge thing that popped up a while back, is it dead?
Do you mean the Rotherhithe-to-Isle-of-Dogs bridge that was part of Sustrans' GOAL2012 proposals?
They still seem to be pursuing it, the latest I can see is here:
http://www.sustrans.org.uk/news/talks-underway-new-thames-cycle-bridge
It should have been funded by the Olympics and would be a good project. Not very close to the alignment of your commute, of course.
They did a good feasibility study back then.
Edit: Either they or someone else has put up a web-site:
I liked the spiral bike bridge thing that popped up a while back, is it dead?