Sony Ericsson builds Wi-Fi and EDGE into a single card, the GC-89: This new card should be available for American EDGE networks, and offers the ability to switch (but notice no mention of seamless switching) between cell and Wi-Fi networks. The card will be available later this year, and cell carriers should have it by 2005, according to Macworld. The press release says there will be a Macintosh version of the card, but it's probably the case that just a driver is needed.