Regarding the wikileaks allegations, they were reported in other media, including here, here and here. 

Regarding the Gaddafi book printing affair, it was mentioned here, in an article written for the Middle East Forum by Daniel Nassif, who is now the head of the Congress-funded Al-Hurra. The context clearly shows the link between Nabih Berri and his sister-in-law, which is common knowledge in Lebanon, and was intended to demonstrate that Berri works for his own interests and not for any specific ideals. Another source mentioning Berri's proximity to Samira Assi can be found here. 

Berri's corruption is mentioned in scholarly books and these sources cannot by any standard be considered as either poor or unreliable. Simply running "Nabih Berri corruption" through Google Books can show the extent to which his corruption is mentioned and recorded.  Furthermore, the article should include a criticism section, as is the case in many other biographies of living persons. 

Lastly, regarding the sockpuppet, you have blocked him for a week, and I believe that he should have been blocked for a longer period, as one of his accounts had been blocked for edit warring and he immediately created another account to insert his edits, and his demonstrated knowledge of Wikipedia rules prove that he was aware of his violations, be it edit-warring or sockpuppetry.