So far, these are numbers we got: Nos reported 4000+ subscribers maybe a week ago
(this is easily higher now - the number was rising very quickly from previously reported 3k+ to 4k before that announcement, and during the beginning of the hype campaign), 1205 overall "distinct" testers
(as cardk already said) during open sessions and there is 1271 facebook likes currently.
Key question is not how huge initial numbers will be
(these can easily be server-crushingly huge
) but what will happen in the long run, connected both with Nos stability (DDOS...), quality of polish
(especially low level polish IMO - once people ding 60, they will be too invested and much less likely to just leave) and eventual Kronos launch.