As with many other things, TILB is the first or one of the first to bring interesting investment related documents to the public internet. Mr. Ackman's firm, Pershing Square, often circulates his presentations a few days after the actual public talk with the tacit acknowledgement of its subsequent public dissemination. We hold Bill in high regard and believe his case for CXW is compelling (as disclosed earlier: we have been owners of CXW at various times over several years including now and the past few months).
You can find some of our prior discussions of Ackman here.
See below for his Corrections Corp. thesis.
Prisons' Dilemma - FINAL (10!21!09)
[link to our scribd in case the embedding doesn't work]