Obama's recent missed votes according to govtrack.us:
Feb 7, 2008 5:59 PM Absent Feingold Amdt. No. 3913, S. 2248: FISA Amendments Act of 2007 (On the Amendment)
Amendment Rejected 38-57, 5 not voting
Feb 7, 2008 5:26 PM Absent Feingold Amdt. No. 3915, S. 2248: FISA Amendments Act of 2007 (On the Amendment)
Amendment Rejected 40-56, 4 not voting
Feb 7, 2008 4:36 PM Absent H.R. 5140: Economic Stimulus Act of 2008 (On Passage of the Bill)
Bill Passed 81-16, 3 not voting
Feb 7, 2008 4:11 PM Absent Reid Amdt. No. 4010, H.R. 5140: Economic Stimulus Act of 2008 (On the Amendment)
Amendment Agreed to 91-6, 3 not voting
Feb 6, 2008 5:46 PM Aye Motion To Invoke Cloture On The Reid Amdt No. 3983
Cloture Motion Rejected 58-41, 1 not voting (3/5 required