I am not, in fact, a lawyer, but I do know how to use Google (unlike so many here). For instance, I can, without any adult help, open up my web browser, and type in http://www.google.com/ and go to a convenient search engine. In the search box for that search engine, I can type in "eula struck down as unconscionable" and click on the button labeled "Search." And get results such as
this, which talks about Bragg v. Linden Research, Inc., in which Linden's TOS (specifically, the arbitration clause) is struck down as unconscionable not once, not twice, but at least three or four different times and ways ("procedural unconscionability" and "substantive unconscionability" in two different ways, and then again on the latter after Linden amended it).
Wired also covers Gatton v. T-Mobile, again on an arbitration clause, and ruled unconscionable both procedurally and substantively. Also unconscionable for prohibiting class action lawsuits, because "that form of litigation is often the only means of stopping and punishing corporate wrongdoing." It also discusses Douglas v. U.S. District Court, which is about changing the terms of a contact after it has been signed, and which was ruled unconscionable. Gatton is often cited as recognizing that all click-wrap license have an element of unconscionability that must be considered by the court.
This has a link to this", which is a ruling on McKee v. AT&T, ruing their arbitration clause unconscionable.
Note that these are the first three results on the search, and the fourth is on McKee v. AT&T again.
Also note that these are all different courts, state and federal, all over the country.
Unconscionability is an affirmative defense - the defendant has to demonstrate why the contract is unconscionable, but it does, in fact, happen, and more importantly, it took me, literally, less than ten seconds to find example (and five of that was waiting for the browser to open.)
To quote the third link, you may now feed my cats for a week.