Hardware site AnandTech has posted an extensive review of the fifth generation AirPort Extreme base station and the fourth generation Time Capsule, and while you may not want to read the entire 9-page review, it's worth popping to the end, where author Brian Klug explains how an internal hardware change (from Marvell to Broadcom) gives these new models improved throughput and range. follow link
View Extra Sync Details in Snow Leopard
In Snow Leopard, Option-click the Sync icon in the menu bar to display a menu showing each available sync service and when it was last synced. Other new items in that menu include commands to Reset Sync Services entirely and to open the iSync and Sync Diagnostics utilities.
New AirPort Extreme and Time Capsule Feature Improved Throughput
Check out the Take Control ebooks that expand on the topic in this article: