Can anyone comment on specific brands of laminate flooring you
have experience with?
I have heard that Wilsonart is highly recommended for radiant
heat, has anyone any experience with Sunway or Pergo?
I would recommend that you take a look at ifloor.com for some excellent product reviews. They may not specifically address the radiant heat question, but Steve, the owner, is great at responding to e-mail inquiries.
I've heard Pergo is well suited for radiant heating, providing the correct Pergo moisture barrier is used. Pergo is from Scandinavia, where radiant heating is very common. It is actually much more common than forced air heating, and most new homes are built with radiant heating, so one could claim that Pergo is built for radiant heating use.
Those happy Swedish feet ...!