Yeah, definitely email them before ordering, as that is conflicting material. Also,
www.ramseeker.com and
www.18004memory.com have always been reliable places to get PowerBook RAM at great prices.
And to answer the secondary question, no one on these boards have tried the 1GIG RAM modules in the 17" PB as far as I know...most will wait until the price drops because with RAM passing 1GIG, the law of diminishing returns really begins to take effect, and the tiny performance gains just aren't worth it.