This is where I'll post links, information and advice for Black Templar players.
But really and truly, Marshal Laeroth does the best BT for beginners out there. His Black Templars 101 is ESSENTIAL reading for anyone wanting to build a Crusade.
Rites of Battle has an incredible array of fantastic information for a new BT player as well.
Nikephoros, besides being a fantastic troll, is not a shabby source of wisdom on the Emperor's Chosen at all.