Our S3-compatible store died. Anyone know of an S3-compatible storage host?

Our S3 compatible store, A cloudian instance, provided by Constant.com has died. Data is still available but we cant' store anything on it.

We're looking for an alternatives solution, but the main players (Amazon themselves, Google, and Rackspace) are too expensive in terms of bandwidth out (150TB per month).

Does any one have any suggestions for an S3-compatible storage host, and what technologies they use under the hood (Ceph, OpenStack, etc.)?