Looks like OK has shifted from toss-up to leans R.
http://www.soonerpolitics.com/Volume14Number5.pdfThis and the recent poll putting Coors slightly ahead in CO, pretty much eliminate the Democrats chances of winning the Senate
http://www.surveyusa.com/2004_Elections/CO040817pressen.pdfThe Republican will pick-up seats in GA and SC, and the Democrats will pick-up IL. Even if the Democrats hold NC, LA, and FL and SD and take AK the Senate will still stay Republican.
Much more likely, the Republicans will end up with a net 1-3 gain in the Senate