Andrew Smith wrote:
Anybody heard of any plans for Weekly capping ?

No, I've never so much as a whisper, at least not from TfL. The only
place I've ever read the words 'weekly capping' is on this newsgroup
(or on uk.railway).

As other posters have mentioned it would be very complex to implement,
and even if it were possible, it could well cause a large amount of
passenger confusion.