I think some people are thinking about full Caissa runner decks (without icebreakers) but I doubt that'll ever be possible. Anybody care to do a little theorycrafting on each card's specific uses?
Pawn seems iffy, essentially saving you an install click and (at the moment) up to 2 credits as long as the timing of the install fits your plan. Thinking a little outside the box here, but perhaps with Sneakdoor you could Pawn -> Sneakdoor allowing you to both access their hand, get a Caissa out, and spread defenses even thinner.
I'm not that sold on Knight just yet. Thoughts?
Rook is actually the card I would be most worried about, and would probably be willing to trash most unrezzed ice to remove it from the game. I guess Pawn could just bring it back, really just slowing the game down tremendously. Perhaps Pawn is best used to bring Rooks back -- two Rooks on a server would just make me so freakin sad. I honestly wonder if Rook will make it into other decks, particularly Criminal. That's an archetype I could see being interesting -- Crypsis-only + Caissa Gabe/Andy, especially with Running Interference.
I wonder if we'll see a Deja Vu equivalent for Caissa programs.
What kind of decks do you see these being effective in? An opening Rook would allow the runner to seriously go to town, costing the corp a fortune -- how would you capitalize on it? Imp? Indexing? FAO? I actually think Sneakdoor would be interesting in Reina, given her capability to slow the corp down so much.