Just thought I would throw this out to the colle gang: As as Colle player, what is your favorite response to a Kings Indian/Pirc defense setup?
Wefedog,
When someone fianchettos against me, the first thing I do is see if I can kick him in the kneecaps without getting DQ'd.
After that, I have normally switched to the Barry Attack.
However, I recently found an odd French Attack [Reversed French Defense] line that I believe I will include when I expand Zuke 'Em to be a an entire repertoire.
Actually, you can see the sketch of this idea on my Zuke 'Em update page [I see chess books like software...you should not have to buy a whole new book just to get an update/upgrade.]

I'm usually fine playing a Colle System as White, but I was thrown off after 1.d4 d5 2.Nf3 Bf5, shown in the diagram below.
How should I play as white from here?Hi Sprite,
I'm the author of a book on the Colle [see www.zukertort.com], and there are 2 basic ways of dealing with this setup [note, this setup is rather different from the apparently similar 1.d4 Nf6 2.Nf3 d5 3.e3 Bf5, which is more complex and testing.]
As I explain in the philosophy section of my book, the Colle-Zukertort (the version of the Colle I specialize in) is completely based on Black's inability to easily develop his Bishop in Queen's Pawn games. For that reason, you should in no way feel obliged to trudge on with the Colle system after Black plays his Bishop out so early.
Instead, you should indeed play out 3. c4. The question is how you deal with 3...e6.
One plan is to play 4.Qb3 Nc6 5.c5, cutting off Black's K-Bishop from b4. The idea (in that plan) is to play Bf4 later, putting pressure against Black's Queen-side [which neither Bishop can really protect now.]
The problem with that plan in general is that Black can just play ...Nh5 at an appropriate time, and White doesn't really have a good place to put his Bishop. [Taking the time to play h3 first doesn't work out very well either]
The line I give in Zuke 'Em is instead 4.cxd5 exd5 5.Qb3 Nc6 6.Nc3...when he most interesting question (unanswered, as far as I know, by any (other) colle book) is how to deal with 6...Nf6 here.
I suggest and give support for the exciting gambit 7.e4!?!, which is both theoretically sound (full compensation for the pawn) and I can guarantee your opponent will not be prepared for it!