Here is some additional info about Texas specifically (Thanks to Students for Policy Awareness @ Rice for providing this and other info):
Texas Research
http://www.coderedtexas.org (Code Red)
http://www.texashealthinstitute.org (Texas Health Institute)
http://www.cppp.org (Center for Public Policy Priorities)
http://www.cfpa.org (Center for Policy Alternatives + links)
http://www.cpa.state.tx.us/specialrpt/uninsured05 (fantastic)
http://www.accessproject.org/medicaid.html (bottom of page)
Code Red is pretty interesting. Here is the intro:
Texas faces an impending crisis regarding the health of its population, which will profoundly influence the states competitive position nationally and globally. The health of Texas, economically, educationally, culturally and socially depends on the physical and mental health of its population. Quality of life for individual Texans and the communities in which they live depends critically upon health status. In the state, 25.1 percent of the population is without health insurance, the highest in the nation and growing. The increasing discrepancy between growing health needs and access to affordable health insurance coverage creates the conditions for a perfect storm.
http://www.coderedtexas.org
http://www.window.state.tx.us/specialrpt/uninsured05/
The Uninsured:
A Hidden Burden on Texas Employers and Communities
April 2005
...
Texans living in urban areas are less likely than the average U.S. citizen to have health insurance. According to the U.S. Census Bureau, almost one in six Americans is uninsured; in Texas, the ratio is one in four. While there is substantial variation among Texas cities, every major city has an uninsured rate higher than the national average.
The U.S. Census March 2004 survey reports that an average of about 5.4 million Texans, or 24.6 percent of the states population, were uninsured.[1] Based on a Comptroller analysis of Census data, Laredo, Brownsville and El Paso had the highest rates of uninsuredone in three residents of these cities lacked health insurance. Houstons uninsured rate was almost 28 percent.[2] Austin has the lowest ratio of uninsured for this period, at 18 percent.
...
The sheer number of uninsured Texans makes healthcare less affordable for Texas employers and individuals. Much of the cost of providing health care for the uninsured ultimately is transferred to those who have health insurance through higher health insurance premium costsand to Texas taxpayers who pay for uncompensated care in public hospitals and other programs.
*******
This is a crisis which health insurance companies have helped create. I'm not sure that health insurance companies can be part of the solution. The only systems I am aware of that actually provide world-class healthcare to its citizens are single-payer systems run by the gov't. That's the only proven solution.