Saw a post over at WoWInsider that Wowhead now has a talent calculator up for Death Knights (DK's) and a few other classes based on actual information from playing the classes at the recent WoW Invitational in Paris.
Anyway I'm excited about DK's so wowhead apparently have a talent calculator up for Death Knights. If your bored till WotLK arrives where everything will be official and set in stone well you can play around and spec your imaginary DK. You can play around and have a idea of where your want to go when your DK spec. Linked Here.
Will play with it when I have time myself. All three specs seems viable to some degree for individual spec's vs cookie cutter specs.