Where, exactly, is Coinbase?
From the
user agreement on their web site: "Coinbase, Inc., 548 Market Street, #23008, San Francisco, CA 94104." That's a mailbox store. It's the same one Tradehill used.
From
FinCen registration: "1811 Silverside Rd, Wilmington, DE 19810". This is the address of
Chabad Lubavitch of Delaware, which is a religious facility.
From their
SEC filing: "1 BLUXOME STREET, APT. 410 SAN FRANCISCO CA 94107 415-843-1515". That's an apartment.
Dun and Bradstreet has the apartment address. California Sec. of State has the Market St. mail drop.
Be suspicious, especially since people are reporting withdrawal problems.