Their newest catalogue was in my mailbox last night, and clearly some knit picks yarn lines are on the rise. Pattern prices on the whole just went up by a dollar. (Conversely, they're $.50 cheaper if you download them with your order). Alpaca and Alpaca blends and their Essential sock yarns are the ones to look out for.
Prices have not been raised on their website-- yet, so if you need (ok, want) some KP at their previous prices, you better order it right now!
*although, the difference is only 30 to 50 cents a skein. Not earth shattering, but notable.