Not bad for a candidate with little money and zero major media coverage. Poll numbers by state:
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New Hampshire - 10%
Oklahoma - 9%
New Mexico - 9%
Nevada - 9%
Georgia - 8%
Colorado - 8%
Minnesota - 8%
Iowa - 8%
Arizona - 7%
Ohio - 7%
Indiana - 7%
Tennessee - 7%
Texas - 6%
Florida - 6%
Missouri - 6%
Oregon - 6%
Michigan - 6%
Maryland - 6%
South Carolina - 6%
Virginia - 5%
Illinois - 5%
Washington - 5%
California - 5%
Connecticut - 5%
Massachusetts - 5%
Pennsylvania - 5%

http://www.lewrockwell.com/blog/lewr...es/021922.html
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And the number in New Hampshire is even biiger news, because it shows that Barr is picking up support beyond just the "fringe voters:"

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Dante Scala teaches American politics at the University of New Hampshire, and he’s frankly bewildered by the recent Zogby poll results that show these results:

Obama: 40
McCain: 37
(national Libertarian Party candidate) Bob Barr: 10
Nader: 2

The reason for his puzzlement? In January Ron Paul got some 18,000 votes in the New Hampshire GOP primary. If you assume that every one of these Granite State citizens now plans to vote for Barr, that still amounts to just 2% to 3% of the expected turnout in November. “So Barr at 10 percent right now is tough to believe.”

http://thirdpartywatch.com/2008/07/1...-in-his-state/