It hasn't changed too much but here is the next list update: I will include a 2010 team after the Championships.
2010:
2009:
2775 (Jackson Area Robotics - 1x Regional Winner, 1x Regional Finalist, 2009 Championship Division Finalist, 2009 IRI Alliance Captain)
2008:
2337 (EngiNERDs - 1x Regional Winner 2008, Championship Highest Rookie Seed)
2007:
2056 (OP Robotics - 8 of 8 Regional Wins)
2006:
1717 (D'Penguineers - 4x Regional Winner, 2008 & 2009 Championship Division Finalist)
2005:
1625 (Winnovation - 5x Regional Winner, 2006 Championship Division Finalist)
2004:
1251 (TechTigers - 4x Regional Winner, 4x Regional Finalist)
2003:
1114 (Simbotics - 12x Regional Winner, 2006 Championship Division Finalist, 2008 Championship Winner)
2002:
987 (High Rollers - 4x Regional Winner, 2007 Championship Winner, 2008 Championship Division Finalist)
2001:
494 (The Martians - 4x Regional Winner, 2003 Championship Division Winner, 2004 Championship Winner, 2005 Division Finalist)
2000:
469 (Las Guerrillas - 7x Regional Winner, 2001 & 2002 Division Finalist, 2003 Championship Winner, 2004 Championship Finalist, 5x IRI Champion)
1999:
254 (Cheesy Poofs - 18x Regional Winner, 2001 & 2005 Championship Finalist, 2008 Championship Division Finalist)
1998:
69 (Hyper - 7x Regional Winner, 3x Regional Finalist)
1997:
67 (HOT - 13x Regional Winner, 2003 & 2007 Division Finalist, 2004 & 2008 Division Winner, 2005 & 2009 Championship Winner)
1996:
71 (Team Hammond - 11x Regional Winner, 1997, 2001, 2002, 2004 Championship Winner, 2007 Championship Finalist)
1995:
177 (Bobcat Robotics - 4x Regional Winner, 2001, 2006, 2008 & 2009 Championship Division Winner, 2007 Championship Winner)
1994:
1992:
148 (RoboWranglers - 6x Regional Winner, 2008 Championship Winner)
Notes:
2008: I'm still sticking with 2337 over 2619.
2000: Stacked year with plenty of good teams and programs. Moe might win it on reputation and recognition, but 469 is on top with statistics and robots (especially given their success this year)
1996: Note that 1996 was a stacked year as well and many teams who aren't on this list still deserve much recognition.
1999: 254 is still above 217 because of their long history of success (although if 217 continues their Champs performances this year that could very well change.
1998: I put 69 above 68 because their programs are very similar but 69 has had a better year this year... on top of that, they choose not to go to the Champs some years, which is why they haven't had International success.
1994: Still nothing
1992: Still close between: 148, 45, 190... but 148 has had more recent success so they go in the #1 spot.
Also, check out my next post for a new discussion which I'm sure everyone will be excited about
-TheFish