Stucco, take a look at this on your 5th Amendment argument.
From the USSCt.:
"It is clear that the protection of the [5th Amendment] privilege reaches an accused's communications, whatever form they might take, and the compulsion of responses which are also communications, for example, compliance with a subpoena to produce one's papers. On the other hand, both federal and state courts have usually held that it offers no protection against compulsion to submit to fingerprinting, photographing, or measurements, to write or speak for identification, to appear in court, to stand, to assume a stance, to walk, or to make a particular gesture. The distinction which has emerged, often expressed in different ways, is that the privilege is a bar against compelling "communications" or "testimony," but that compulsion which makes a suspect or accused the source of "real or physical evidence" does not violate it."
"Since the blood test evidence, although an incriminating product of compulsion, was neither petitioner's testimony nor evidence relating to some communicative act or writing by the petitioner, it was not inadmissible on [5th Amendment] privilege grounds. "
http://caselaw.lp.findlaw.com/scripts/getcase.pl?court=US&vol=384&invol=757Texas Rebel, the reason I do not anticipate any change in my lifetime is based on the fact that this practice in founded in case law and statute that have been in place for 30-40 years. In addition, the practice of the Texas Legislature since at least 1984 has been to close loopholes in DWI law and make easier and easier for law enforcement to gather evidence and make cases. This trend was very prevalent in the last session.
[This message has been edited by litig8r187 (edited 4/13/2010 11:54a).]
[This message has been edited by litig8r187 (edited 4/13/2010 11:59a).]