I don't know a lot about this polling company, or this source, but a friend of mine sent me this:
http://www.decisionanalyst.com/publ_data/2008/obama.dai---------------
Arlington, Texas (Feb 21, 2008)— Barack Obama has a double digit lead over Hillary Clinton in Texas, according to a statewide survey of 678 registered voters planning to vote in the March 4 Democratic Primary. The survey was conducted February 20 and 21 by Decision Analyst, a major national survey research firm. Decision Analyst projections indicate that if the election were held today Obama would win 57% to 43% over Clinton. The survey�s margin of error is 3 percentage points, plus or minus, at a 90% level of confidence.---------------
Sorry if this has already been posted. Just let this post drop off the page if that's the case.