hashnest is down ...
It'll be back up, they added hashnest s4 to their store. I assume it's all an update.i do not see any s4 on the market place
"HASHNEST is very proud to announce its ANTMINER S4 Market Purchase S4, Convert it to Hashrate, and mine at Antpool, which will be online at 10:00am on Jan.14th, 2015 (GMT+8 Time Zone). S4 Market will open a total of 2200TH/s generated by 1100 units of S4 while consuming 0.7W per GH/s.
BITMAIN will cover the downtime loss, providing 100% hashing function guaranteed. Payout is based on the PPLNS mode of Antpool, which is subject to its pool luck. Even if ANTMINER S4 you bought fails indeed, HASHNEST would automatically compensate the mining loss to your account based on the hashing power you bought.
"