This newsletter is fantastic. It's one of the only subscriptions I get in my inbox that I make sure I read every time. Kale does a great job curating the best of HN across a variety of categories. Congratulations on 100 issues, and 10,000 subscribers.
A quick tip regarding running Twitter contests: always make use of an @reply or @mention in the text people should tweet. As Twitter's guidelines mention, otherwise you run the risk of not finding all of the entries:
Thanks for letting me know that... I had no clue about the search filters. I have a script that collects them, but I guess there is a chance it won't see all of them so I will work on some new text now!
+1 (more subscriber). wish i had discovered this a while ago.. was piecing through the archives after signing-up just now, already stumbled upon some great posts i missed.