Well i was trying to avoid to give system tool to new commers since they can mess things up real bad, but if you guys want them, here they are.
Cydia is just a front end for apt-get, if you have SSH access, you can do
to update the repositories.
Edit: ----- NOTE: you cannot run apt-get while Cydia is running ---------
them:
Reboot
That should bring you to the most recent version available, if after that still doesn't take yo to V73 then you need to wait for the official word from the "man" since that means that they remove v73 for some reason (but i doubt it).
Please do this with care and I take no responsibility for broken systems.