I checked the US Trademark database and several variations have successfully been registerd, but someone registered "Bitcoin" already then abandoned it (fools!)
So this guy may very well get it.  And he will be extremely wealthy ...
Not sure if this link will work for anyone but me:  
http://tess2.uspto.gov/bin/showfield?f=doc&state=4805:9m8v89.2.16Word Mark    BITCOIN
Goods and Services    (ABANDONED) IC 036. US 100 101 102. G & S: Financial services, namely, providing a virtual currency for use by members of an on-line community via a global computer network. FIRST USE: 20110622. FIRST USE IN COMMERCE: 20110622
Standard Characters Claimed    
Mark Drawing Code    (4) STANDARD CHARACTER MARK
Serial Number    85353491
Filing Date    June 22, 2011
Current Basis    1A
Original Filing Basis    1A
Owner    (APPLICANT) Magellan Capital Advisors LLC DBA Magellan Capital LIMITED LIABILITY COMPANY NEW YORK Suite D 1065 Main Street Fishkill NEW YORK 12524
Attorney of Record    Michael S. Pascazi, Esq.
Disclaimer    NO CLAIM IS MADE TO THE EXCLUSIVE RIGHT TO USE "COIN OR BIT" APART FROM THE MARK AS SHOWN
Type of Mark    SERVICE MARK
Register    PRINCIPAL
Live/Dead Indicator    DEAD
Abandonment Date    July 7, 2011
----------------------------
THE OTHERS......
1    86097068       BITCOIN          TSDR    LIVE  <----------------- the current applicant
2    86012793       EASY BITCOIN       TSDR    LIVE
3    86093640       AMERICAN BITCOIN    TSDR    LIVE
4    86075129       BITCOIN INVESTMENT TRUST    TSDR    LIVE
5    85877951        MILLY BITCOIN       TSDR    LIVE
6    85974859       WINKLEVOSS BITCOIN TRUST    TSDR    LIVE
7    85934674       BIVALENT BITCOIN JEWELRY    TSDR    LIVE
8    85887743       M-BITCOIN          TSDR    LIVE
9    85798479        BITCOIN MAGAZINE    TSDR    LIVE
10    85887676       BITCOIN MOBILE MONEY    TSDR    LIVE
11    85883441       BITCOIN          TSDR    DEAD
12    85888809       BITCOIN COMPUTER    TSDR    LIVE
13    85373341       BITCOIN APPLIANCE    TSDR    DEAD
14    85405348       BITCOIN MERCHANT SOLUTIONS    TSDR    DEAD
15    85405343       MERCHANT SOLUTIONS FOR THE BITCOIN CURRENCY    TSDR    DEAD
16    85353491       BITCOIN          TSDR    DEAD