On Sun, 9 Oct 2005 17:57:58 +0100, "Sunil Sood"
wrote:

So if you were to buy a ticket from Wimbledon on your Oyster card you would
receive a National Rail discount if due as well?

You would receive the same discount, if any, as holders of SWT paper
Travelcard seasons.

Would this apply to travelcards (say Zone 1-3)

Yes

as well as season tickets (Wimbledon to Waterloo)

These tickets are not available on Oyster.

and do they have to be any minimum length (weekly/monthly etc)

The minimum is 1 month.

Are these National Rail % discounts listed anywhere?

Err, pass. The individual TOC websites should have them though.