There has been a HDD crash thats why dream was down, Looks like some Users lost their BTC:
Dear members,
There was a hard drive crash and a wallet file is corrupted. We currently trying to recover the corrupted data.
Not all users are affected. We are working on the solution for those who are affected
conducted orders and orders in escrow are safe.
We apologize for this serious problem, we hope to recover the lost funds soon.
Source: Dream Market
Ahahaha I lost £3 worth of coins. What a shame, guess I won't be buying a sandwich today.