I'm facing exactly the same dilemma soon, mating Pergo flush with ceramic tile...Do we glue the flooring edge down? Do we secure it with some sort of flush trim? Or , do we leave it loose (per the Pergo instructions, for expansion/contraction purposes), and trust it to stay down? I'd be interested in knowing what you get in the way of advice, and what you end up doing. Please e-mail me with results! Geoff at Brainstorm@Unidial.com