Howdy!  Much has transpired since I posted this patch.
* Guido expressed interest in having it in Py3k.
* I ported it to Py3k; it's Python patch #1629305 on SourceForge.
* Guido didn't like it, specifically discussing the pathological behavior of "lazy slices".
* I created a "v2 lazy slices" that eliminated the pathological behavior but added a lot of complexity.
* I ran a poll on the Py3k mailing list to see how interested people were in "lazy concatenation" and "v2 lazy slices".  Most people were +1 on lazy concatenation, and -1 on lazy slices (v1 or v2), a position I can completely endorse.  However, no Python luminaries replied, which--given the patch's checkered past--seemed like a vote of no-confidence.
* Guido closed patch #1629305.

Is there life after Guido patch-closing?  I'd be happy to spend the time answering your questions if my patch had some sort of future.  (Though you'll have to tell me what you mean by "break strict aliasing".)