the jet driver would already be on a normal server, but only works from 32 bit installations, ie SQL 2005;
if you are on a 64 bit SQL server, you need to install the ACE drivers (probably witht eh /passive switch), and use
something like this:
SELECT * FROM OPENROWSET('MSDASQL',
'DRIVER=Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb);
UID=admin;
UserCommitSync=Yes;
Threads=3;
SafeTransactions=0;
ReadOnly=1;
PageTimeout=5;
MaxScanRows=8;
MaxBufferSize=2048;
FIL=excel 12.0;
DriverId=1046;
DefaultDir=C:\Data\BlockGroups_2010;
DBQ=C:\Data\BlockGroups_2010\AKblockgroup.xls',
'SELECT * FROM [AK$]')
Lowell