You must have read my mind - I was going to start a similar thread tonight.
Amazon should have all the release dates (except that
Dawn of the Dead was released as an HMV exclusive before becoming available elsewhere).
You've missed the new
Caligula Blu, plus Arrow are also set to release
Vamp later on in the year too.
I think keeping track of these releases is a very good idea, as it will help people maybe new to Arrow discover some more of their releases, and also provide info on what is coming soon in one convenient thread.