The iPlayer will be for some programmes, and I thought mainly archived stuff.
Most content will not be available, if it was, ABC may as well close down it's TV arm.
Sport will definitely not be available (MOTD for example). The 70gbp will be basically for downloading stuff that you can buy on DVD anyway.
Also remember once you have sgned up as an overseas user, you will not be able to use your proxy for downloadng, the iPlayer client itself will know who you are.
As for Proxys, they are not illegal, but buying a gun isn't either...it's what you do with it that can be.
When the promised clamp down on illegal downloads happens, don't say you weren't warned!