well, for those wondering whether it is safe or not, i purchased my antminer on a saturday... sent an email and received no response (no email from purchase nor when its shipped nothing), however, monday was shipped, and by wednesday/thursday was at my house.
it's been working for the past 2hr~ at steady 178GH/s (no overclock) w a 750corsaircm... all good, recommended...
I ordered an Antminer S1 this past Saturday (3/29) and today (3/31) my status shows as "shipped." UPS tracking shows that it should be here Wednesday from China. That's pretty fast!