Come across this "Diary" via the DPR Forum where the poster introduces his diary, named the "645Diary" himself.
I have had a look at the 645Diary and have some good impressions on it. So, I would like to recommend it here, at my Blog.
Other than those photography stories shared by the author, there are also a few sample photos in small size mostly and occasionally in larger size. In particular, this ISO 800 sample from the 645D (RAW converted) has good noise performance and tonality, which is worth to take a special look.