I saw it recently on HBO. It was a very loving, moving tribute to Mr Cazale. I admit, I never really noticed him before even though I'd seen his movies. I fault myself for that. Its easier to notice the taller guys, the handsomer men, the "stars" and overlook the guy who plays the schmoe, the shlumpy middle brother. That's my own shallowness I guess, but I took an interest in the documentary and it made me appreciate what a terrific, under rated performer he was. He put everything into his roles and he added something quite special to the movies he was in.
Very sad that he died so young, I'm sure he would have given many more great performances had he lived.

It's an excellent, affecting, and illuminating tribute to a great and gifted actor who left us much too soon.
1,000 mini-bios and I feel like I'm just getting started

It's on it now. It's the most recent item listed for Meryl Streep featured "as self". I can't believe she's actually doing it she was his fiancee and she's rarely mentioned him in the years since, presumably because she misses him very much. That'll be interesting to see.
"The Academy Award for Best Actress in a Leading Role goes to Meryl Streep!" ~Oscars '09