Wikipedia as a textbook?!!

With information continuing to change, how do we go about providing our students with the most up-to-date content?
The half life of information is increasing. Textbooks are filled with incorrect information almost immediately after they are published. I begin to wonder how accurate this fact is? Does it only apply to certain subjects? Is there not information that stands the test of time? If the information is incorrect shortly after a textbook is published, then how do these companies make money? Who is willing to buy these textbooks knowing the majority of the information is inaccurate or going to be proven wrong? It seems to me that this is where the internet can come in and fill in some of the informational gaps. We need a source that carries the "up-to-dateness" of Wikipedia but with the credibility of a textbook. Whether we agree with it or not, Wikipedia does not have the best reputation when it comes to the academic world. However, Wikipedia does a few things very well: their information can be checked and verified by the people, as well as information can be updated at any point when new or more accurate information comes available.
In thinking about what this resource would look like, I envision an E-book style of textbook. One that can be updated at any point, and the information can be verified or challenged by everyone (or possibly just a committee of experts in that field).
Because the information is losing its value, students need to have acquired the skill of knowing what sources they can trust and where to look after school is over. This is something we need to be teaching in our classes. We need to show students what a trustworthy source looks like as well as seeing the value in looking a multiple perspectives. If students know where to look, it is not as detrimental that the textbook information is out of date in five years because the students understand how to continue their learning in the future.