what are the great cricket rivalries?

It seems half of the series Australia are involved with are touted as great cricket rivalries: Australia/England is special because of it's long history and the colony/motherland aspect of it. Australia/India and Australia/South Africa have become great rivalries, largely because of the quality of the teams involved and the rankings prospects whenever they play. Australia/New Zealand is the local derby. Australia/West Indies used to be touted as a great rivalry, but that died off with the great Windies teams.

Apart from the legendary India/Pakistan rivalry, I'm really not aware of what the great rivalries are for other countries. So, what are they... and why?

Kevin Pietersen vs ECB

Canada versus USA

West Indies Cricket Board v West Indies Cricket Team

South Africa vs England (otherwise known as South Africa vs South Africa 2nd XI)

Lancashire v Yorkshire.

Just to bring up some real ancient history - Barbados and Guyana had a serious rivalry back in the day.

Quite funny actually..

but on a more realistic note i feel Aus vs Eng has been the greatest ever cricket rivalry,and at times Indo Pak cricket matches,they are often nail biting and involve a huge amount of rivalries.

Nothing can come close to Pakistan vs India.

Ashes is a hundred year ole relationship between england and her penal colony ! :-[

Exactly,those nail biting finishes make up for much more than a notch up tension.Adding more fuel to it is the sledging and the contrasting relationships between the 2 countries.