Conference USA in 2004:
TCU - now in the Big 12
Louisville - now in the ACC
Cincinnati - now in the AAC (former Big East)
East Carolina - now in the AAC (former Big East)
Houston - now in the AAC (former Big East)
Memphis - now in the AAC (former Big East)
South Florida - now in the AAC (former Big East)
Tulane - now in the AAC (former Big East)
Army - now Independent
UAB
Southern Miss
This list doesn't include schools like SMU, Tulsa, and Central Florida, who didn't join CUSA until after 2004, but still wound up in the AAC. Had the 2004 version of CUSA stayed together, it would be almost as good as the ACC is today and would definitely be the strongest non-power conference.
Compare this to the 2014 Conference USA lineup, along with their 2004 conference:
UAB
Southern Miss
Marshall (MAC)
Louisiana Tech (WAC)
Rice (WAC)
Tulsa (WAC)
UTEP (WAC)
Middle Tennessee (Sun Belt)
North Texas (Sun Belt)
Florida Atlantic (independent transitioning from FCS to FBS)
Florida International (independent transitioning from FCS to FBS)
Western Kentucky (Gateway Conference - FCS)
Charlotte (didn't have football)
Old Dominion (didn't have football)
UT-San Antonio (didn't have football)
TCU - now in the Big 12
Louisville - now in the ACC
Cincinnati - now in the AAC (former Big East)
East Carolina - now in the AAC (former Big East)
Houston - now in the AAC (former Big East)
Memphis - now in the AAC (former Big East)
South Florida - now in the AAC (former Big East)
Tulane - now in the AAC (former Big East)
Army - now Independent
UAB
Southern Miss
This list doesn't include schools like SMU, Tulsa, and Central Florida, who didn't join CUSA until after 2004, but still wound up in the AAC. Had the 2004 version of CUSA stayed together, it would be almost as good as the ACC is today and would definitely be the strongest non-power conference.
Compare this to the 2014 Conference USA lineup, along with their 2004 conference:
UAB
Southern Miss
Marshall (MAC)
Louisiana Tech (WAC)
Rice (WAC)
Tulsa (WAC)
UTEP (WAC)
Middle Tennessee (Sun Belt)
North Texas (Sun Belt)
Florida Atlantic (independent transitioning from FCS to FBS)
Florida International (independent transitioning from FCS to FBS)
Western Kentucky (Gateway Conference - FCS)
Charlotte (didn't have football)
Old Dominion (didn't have football)
UT-San Antonio (didn't have football)