which is the latest revision

Hi,

In the description of the Ethernet Shield I read "the latest revision adds... the latest revision includes.... previous revisions don't...." but how do I know which is the "latest revision"?
Maybe this applies to other boards as well (I am not sure if some of them has had more than one revision).

Do the boards have a revision number? Where can I find which is the number of the latest revision of each board? If I buy an arduino board from a distributor, I want to make sure I'm buying the latest revision.

Maybe it's there and I don't see it, but I can't find a place where it reads "Latest revision: x.x.x"

thanks
m.

In the description of the Ethernet Shield

What Ethernet shield where?
There are several about you know.

This one

However my question applies to all the hardware listed at http://arduino.cc/en/Main/Hardware