Anonymous checkout for store

Can we instrument the store differently so people do not have to register and create a Web login in order to donate, give a gift membership or make any purchase from the store?

Even though there may be transaction information stored in Drupal, can we do it in such a way that it does not appear as a login id?  It would make the site easier to use for some, if it can be done without a lot of special code.

Once Drupal 6 is running, we need to revisit our initial decision and perhaps change what we do.