I attempted the test with zero familiarity with the case at hand. I also have very little knowledge of the Italian justice system.

One major problem in presenting a probability assessement is that the links presented in the post offer pratically no facts about the case. They are about a Washington Senator's reaction, instead. It would be ludicrous to answer the questions asked given only this information.

So, I went googling around for more information. I promptly hit a snag in that I do not what a fast-track trial is in the context of Italy, and searching for information on that is made very difficult since the search returns articles on the Kercher case.

Attempting to filter out all the extra fluff about the characters involved, the facts of the case, most especially the DNA, seems to point to Guede. There is no hard evidence supporting Knox's guilt, and Sollecito's DNA on the victim's bra is not suprising given their relationship.

Unless the links I read (mostly obtained via Wikipedia) managed to omit something important, I'd say the following:

Knox guilty: less than 0.1 Sollecito: 0.1 to 0.15 Guede: 0.9