HockeyPlayer.com is geared towards developing players, and boasts articles on topics like driving the offensive attack from behind the net, and the details of a left-wing lock. It can be a nice resource for those looking for some further information behind some of the common terms heard during NHL broadcasts.
The other site is one I definitely plan on digging into quite a bit - Lifetime Hockey is focused on the adult recreational player (being a 15-year beer leaguer, that's me), and has some nice articles on shooting, equipment selection, and an animated guide to the Basic Plays of Hockey.
As I find more sites of this kind I'll add them to the blogroll. If you have any suggestions, feel free to leave them in the comments.