AC has already passed this on, but I thought I'd toss it all out there, since it also has some other severe affects on what we used to consider the 'standard' for Lycanthropes.
Btw... this no longer works.
The errata change on it actually dates to 2/17/06, though I didn't notice until the recent article.
http://www.wizards.com/default.asp?x=dnd/rg/20060502a
"A creature cannot use alternate form to take the form of a creature with a template."
Additionally:
"The creature loses the natural weapons, natural armor, and movement modes of its original form, as well as any extraordinary special attacks of its original form not derived from class levels (such as the barbarian's rage class feature)."
Bye bye Feral Lycanthropes...
And:
"Apply any changed physical ability score modifiers in all appropriate areas with one exception: the creature retains the hit points of its original form despite any change to its Constitution."
And Prime, you cannot apply the animal templates to the lycanthrope, as the lycanthrope is not an animal, it is a humanoid or giant.
There is currently no way to gain templated animal forms for lycanthropy.
There
are a few neat tricks with Lycanthropy though, like using
Changelings to, at low levels and with no ECL change, take the form of non-templated super Lycanthropes, like Battletitans (MM3 Dinosaur, 42 Str, 20 NA, 60 speed, Imp Grab, Swallow Whole, Huge size).
There are also some amazing 1 HD creatures, like the Carcass Eater (LM Animal, 17 Dex, 17 Con, 1 NA, Blood Frenzy [When damaging a living creature, gain +4 Str, +4 Con, -2 AC, auto bite for 1d4 when target goes to negative hp, can't be ended voluntarily but has no rage/frenzy restrictions], Small size).