the "issue" with waybackmachine is that once you have closed the history toolbar on top, you can not open it again to switch to another version.
and then there is that inline version of the toolbar, which you get when you start at the startpage:
go to
https://web.archive.org/ and enter "
http://waves.com/"
from here you can now see and open all existing versions of an adress or url.
but to open a version in a new tab - without loosing the overview page, that is - you need to
control-doubleclick in the calendar. (everything else will not work in firefox windows here)