Also, I want to add that only one premium account suffix (or top-level-account name) will be released starting on the 14th day of main net launch. The highest bidder will get whatever suffix s/he bid for in a given day.
This means, if you bid for a premium name suffix with a low ball bid say 1 EOS or something, you may get it on a day when no other token holder has a higher bid (> 1 EOS) across all the names. This is really restricting and is originally designed to stop name squatting (like we have experienced in domain name arena).
However, I really hope that the community will vote for a workers proposal to allow changing this to 10-100 suffixes per day. :)