At 11 Mbs, how does the Airport system work for wireless surfing? I'm planning on installing the Airport Card & getting a base station w/ the new iBook, but am seeing more and more ads for wireless hubs that provide 22 to 56 Mbs. Will the ABS & card be quick enough (primarily to be used for wireless surfing via DSL)? Also, since I'm sure later generations of ABS will have faster transfer rates does this mean the card will need to be upgraded as well?